CISA added two actively exploited MikroTik RouterOS flaws, CVE-2026-67277 and CVE-2026-86060, to its KEV catalog with a September 13 mitigation deadline.
CISA added CVE-2026-67277 and CVE-2026-86060 in MikroTik RouterOS to the Known Exploited Vulnerabilities catalog on September 10, giving federal agencies until September 13 to apply vendor mitigations. CVE-2026-67277 is a missing-authentication flaw (CWE-306) in the bandwidth-test (btest) service that can expose kernel memory and cause denial of service; CVE-2026-86060 (CWE-88) lets attackers manipulate the trusted RouterOS policy mask for privilege escalation. CISA designated CVE-2026-86060 as requiring forensic triage under Binding Operational Directive 26-04, meaning organizations should hunt for compromise indicators, not just patch. Compromised routers could have altered routing rules, persistence, traffic interception, or use as pivots into internal networks.
Canada's Cyber Centre warns of three exploited MikroTik RouterOS vulnerabilities affecting SSH-exposed devices; CISA added two to its KEV catalog.
The Canadian Centre for Cyber Security issued alert AL26-020 for three MikroTik RouterOS vulnerabilities, especially on devices exposing SSH to the internet: CVE-2026-67277 (missing authentication, CWE-306, enabling sensitive information disclosure), CVE-2026-86060 (argument injection, CWE-88, enabling privilege escalation), and CVE-2026-67276 (improper cryptographic signature verification, CWE-347, allowing SSH command channel access without the private key). On September 10, 2026, CISA added CVE-2026-67277 and CVE-2026-86060 to its Known Exploited Vulnerabilities catalog. Fixed versions include RouterOS 6.49.21, 7.23.4 (Long-Term), 7.24.2 (Stable), and 7.25 beta 3.
CISA added two actively exploited MikroTik RouterOS vulnerabilities, CVE-2026-67277 and CVE-2026-86060, to its KEV catalog, mandating federal remediation.
CISA added CVE-2026-67277 (missing authentication for a critical function) and CVE-2026-86060 (improper neutralization of argument delimiters in a command), both in MikroTik RouterOS, to the Known Exploited Vulnerabilities Catalog based on evidence of active exploitation. Under BOD 26-04, Federal Civilian Executive Branch agencies must prioritize rapid remediation of these flaws on publicly exposed assets that grant total control post-exploitation. Agencies are also required to check whether systems were compromised before patches were applied.
MikroTik patches six RouterOS flaws, including the actively exploited MikroTrick SSH chain (CVE-2026-67276, CVE-2026-86060) enabling unauthenticated full router takeover.
MikroTik released patches in RouterOS 7.25 beta 3, 7.24.2, 7.23.4, and 6.49.21 for six vulnerabilities found by CERT Polska, affecting the SSH server/client, bandwidth-test service, X.509 handling, and WebFig. CVE-2026-67276, an RSA public-key validation flaw in the SSH server, lets an attacker who knows a username and key modulus authenticate as that user; CVE-2026-86060 then escalates privileges to root via special-character username handling. CERT Polska confirmed attackers are exploiting the chain to take full control of RouterOS devices with SSH exposed to the internet. Shadowserver Foundation scans show over 122,500 devices with internet-reachable SSH, concentrated in Brazil, the US, and Indonesia.
Canada's Cyber Centre urges MikroTik RouterOS updates as CVE-2026-67276, CVE-2026-67277 and CVE-2026-86060 are reported exploited in the wild.
Canadian Centre for Cyber Security advisory AV26-887 covers MikroTik RouterOS vulnerabilities affecting versions prior to 6.49.21, 7.23.4, 7.24.2 and 7.25 beta 3. Open-source reporting indicates CVE-2026-67276, CVE-2026-67277 and CVE-2026-86060 are being exploited in the wild. The Cyber Centre urges users and administrators to review the vendor advisories and apply the necessary updates.
MikroTik patches six RouterOS flaws; two chained as MikroTrick are actively exploited via SSH to fully compromise exposed routers.
MikroTik released patches for six RouterOS vulnerabilities, including actively exploited MikroTrick chain: CVE-2026-67276 (9.2, SSH auth bypass) and CVE-2026-86060 (9.2, privilege manipulation), plus CVE-2026-67277 (8.8). CERT Poland confirms exploitation since September 2, creating an 'ops' account from IPs 82.192.72.4 and 103.102.31.18. Fixed in RouterOS 7.25beta3, 7.24.2, 7.23.4, and 6.49.21; Shadowserver found 120,000+ SSH-exposed MikroTik devices.
Attackers actively exploit chained MikroTik RouterOS SSH flaws CVE-2026-67276 and CVE-2026-86060, bypassing authentication and escalating to admin to seize edge routers.
CERT Polska warns of active exploitation of a two-flaw chain dubbed 'MikroTrick' against internet-exposed MikroTik RouterOS devices with SSH remote management enabled. CVE-2026-67276 is an SSH authentication bypass in RSA public-key handling, and CVE-2026-86060 is a privilege-escalation flaw triggered via a specially crafted username, letting attackers gain full administrator control without a password. Patched RouterOS packages are already public, and MikroTik added a startup detection that flags unauthorized configuration changes. Compromised edge routers enable DNS hijacking, traffic capture, remote-access tunnels, firewall changes, and lateral attacks.
Google patched an actively exploited Chrome V8 type confusion zero-day, CVE-2026-85046 (CVSS 8.8), the sixth exploited Chrome zero-day of 2026. CERT Polska warned of the MikroTrick exploit chain (CVE-2026-67276 and CVE-2026-86060, CVSS 9.2) giving unauthenticated full control of MikroTik RouterOS devices via SSH, observed since September 2. Sansec disclosed the StyleSmuggler Magento/Adobe Commerce zero-day used since September 4 to inject a Rust backdoor into online stores, while N-able patched three critical N-central flaws (CVE-2026-86206, CVE-2026-86207, and CVE-2026-86218, CVSS 10.0) with Huntress observing likely exploitation. Elastic and Morphisec also detailed RevStealer, an information stealer spread via game cheats and a fake Claude Desktop app.
Attackers actively exploit a MikroTik RouterOS SSH authentication bypass and privilege escalation chain, dubbed MikroTrick, to fully hijack internet-exposed routers.
Poland's CERT, with help from GPT-5.5-cyber and GPT-5.6-sol, discovered and confirmed active exploitation of a MikroTik RouterOS chain dubbed MikroTrick: SSH authentication bypass CVE-2026-67276 (incomplete RSA public key validation) chained with privilege escalation CVE-2026-86060 (crafted usernames granting full administrative privileges). A third flaw, CVE-2026-67277, allows unauthenticated kernel memory leaks or router crashes via the bandwidth-test service. Fixes shipped September 3 in RouterOS 7.25beta3, 7.24.2, 7.23.4, and 6.49.21, adding a startup compromise-detection mechanism. Shadowserver data showed 122,500 MikroTik devices with exposed SSH interfaces as of September 5, and the CERT published IoCs including two attacker IP addresses.
CERT Polska confirms attackers exploit chained MikroTik RouterOS SSH flaws to hijack devices without authentication; patches released in four RouterOS versions.
CERT Polska discovered six RouterOS vulnerabilities and confirmed active attacks chaining CVE-2026-67276 (CVSS 9.2, SSH authentication bypass caused by comparing only RSA key moduli) and CVE-2026-86060 (CVSS 9.2, privilege escalation via crafted usernames), dubbed MikroTrick. A third flaw, CVE-2026-67277 (CVSS 8.8) in the bandwidth-test service, can expose kernel memory or crash devices. Shadowserver counted about 122,500 MikroTik devices with SSH exposed; attackers created a privileged 'ops' account from IP 82.192.72.4, active since September 2. Fixes shipped in RouterOS 7.25beta3, 7.24.2, 7.23.4, and 6.49.21, adding startup configuration scanning with a 'Flagged' marker for unauthorized changes.
MikroTik patched a critical SSH authentication bypass already exploited in the wild; attackers add accounts to affected routers for post-patch persistence.
MikroTik released a patch late last week for a critical vulnerability allowing SSH authentication bypass that is already being exploited in the wild, per the vendor's September 2026 advisory. Attackers have been adding new accounts to affected devices to maintain access even after the patch is installed. The patch attempts to detect compromise and set a 'Flagged' status on affected devices, and SANS ISC advises administrators to assume compromise.
MikroTik RouterOS SSH auth-bypass chain MikroTrick (CVE-2026-67276 plus CVE-2026-86060) is actively exploited; patch to 7.24.2/7.23.5/6.49.21.
Attackers are actively exploiting a chain dubbed MikroTrick that combines CVE-2026-67276 (CVSS 9.2), an SSH authentication bypass in RouterOS RSA public key verification, and CVE-2026-86060, an SSH session privilege escalation, giving full admin control of internet-exposed MikroTik devices without the private key. Exploitation began around September 2, 2026, a day before MikroTik's September 3 patches, with confirmed compromises including creation of an 'ops' account; attacks traced to IPs 82.192.72.4 (Leaseweb) and 103.102.31.18. Fixed versions include 7.25beta3, 7.24.2, 7.23.4, 7.23.5 and 6.49.21. Defenders should check logs for failed logins with username '-2' and inspect /system history for ssh:-2@<IP> entries attached to configuration changes.
CERT Polska warns attackers exploit internet-exposed MikroTik SSH for unauthenticated full admin control; attacks observed since at least September 2.
CERT Polska warned on September 5 that attackers exploit MikroTik routers with internet-reachable SSH to gain full administrative control without authentication, calling the two-flaw combination 'MikroTrick'. Successful attacks date to at least September 2; no victim count or attacker identity was disclosed. MikroTik shipped fixed RouterOS releases: 6.49.21, 7.23.4 (with 7.23.5 fixing an IPv6 DHCP regression), 7.24.2, and 7.25beta3. CERT recommends immediate updates, checking for unauthorized configuration changes, and restricting SSH, WWW/WWW-SSL, and bandwidth-test services on unpatched devices.
Unit 42 dissects FrostyGoop OT malware, which sent Modbus TCP commands to disrupt heating for 600+ apartment buildings in Ukraine.
Palo Alto Unit 42 analyzed new FrostyGoop/BUSTLEBERM samples, the ninth known ICS-centric malware, first used against a Ukrainian municipal energy company by sending Modbus TCP commands to ENCO control devices. The attack caused a two-day heating outage affecting over 600 apartment buildings during sub-zero temperatures. The Go-compiled malware accepts Modbus register operations and timing parameters via command-line arguments or a JSON configuration file, uses an obscure open-source Modbus library, and checks the Windows BeingDebugged flag to evade debuggers. Unit 42 telemetry recorded over 1 million Modbus TCP devices exposed to the internet between September and October 2024.
Argument-Injection Flaw in MikroTik RouterOS SSH Login Enables Privilege Escalation
CVE-2026-86060 is an argument-injection flaw (CWE-88) in MikroTik RouterOS's SSH login path: when a login supplies a username beginning with a prohibited character, the RouterOS login helper mishandles the argument, allowing the trusted RouterOS policy mask to be changed and privileges to be escalated. An unauthenticated attacker only needs the ability to reach the router's SSH service, since exploitation happens during the SSH login process itself. By altering the policy mask the attacker gains elevated rights on the device, and news reports indicate attackers have used this technique — including logins with usernames such as '-2' — as part of chains that take over routers without needing a password. Any RouterOS deployment running versions before the fixes (6.49.21 Long-term, 7.23.4 Long-term, 7.24.2 Stable) with SSH enabled or reachable is affected, with internet-exposed SSH at highest risk. Multiple outlets report the RouterOS flaws are being actively exploited in the wild, although no public proof-of-concept is known and the flaw is not yet in CISA KEV.
· MikroTik RouterOS v6 (Long-term channel) versions prior to 6.49.21 (fixed in 6.49.21) · MikroTik RouterOS v7 (Long-term channel) versions prior to 7.23.4 (fixed in 7.23.4) KEV PoC ×2mass
SSH RSA Authorized-Key Bypass in MikroTik RouterOS 7.x
MikroTik RouterOS 7.x fails to compare the complete RSA public key when matching an SSH authentication attempt against an authorized user key, checking the key type and modulus but omitting the exponent. Because RouterOS verifies the signature against the client-supplied key, an attacker who knows the modulus of an authorized RSA key can present a key with exponent 1 and a forged signature and be accepted as that user without possessing the private key. Successful exploitation opens an SSH command channel as the target user, giving the attacker control of the router without a password or key. Only the RouterOS 7.x branch is affected, with fixes released in 7.23.4 (Long-term) and 7.24.2 (Stable). A public proof-of-concept is available and related reporting describes active campaigns hijacking MikroTik routers using chained RouterOS flaws, though this CVE is not in CISA KEV and its 30-day EPSS probability is low (0.2%).
· MikroTik RouterOS 7.x branch prior to 7.23.4 (Long-term) and 7.24.2 (Stable)mass
Unauthenticated Kernel Crash and Memory Leak in MikroTik RouterOS btest
CVE-2026-67277 is a missing-authentication flaw (CWE-306) in the bandwidth-test (btest) service of MikroTik RouterOS: the service accepts a "related" btest connection before the primary session has completed authentication, so an unauthenticated remote client can start an IPv4 UDP bandwidth test. When the test runs with "random-data=false", the sender transmits an uninitialized tail from a kernel packet buffer, leaking a small amount of kernel memory, and a separate unchecked, inverted packet-size interval causes an unsigned integer underflow that produces anomalously large fragmented output capable of restarting the RouterOS kernel. An unauthenticated network attacker therefore gains limited information disclosure and, more significantly, a remote denial of service through repeated router crashes, with no credentials or user interaction required (CVSS 4.0: 8.8 High). Any MikroTik device running an unpatched RouterOS version with the bandwidth-test server enabled and reachable from an untrusted network is affected. No public PoC or CISA KEV listing exists for this CVE and EPSS is low (0.4%), but it is part of the batch of RouterOS fixes in MikroTik advisory AV26-887 that attackers have recently chained to hijack routers, so in-the-wild exploitation of the flaw set is reported.
· MikroTik RouterOS (Long-term channel, v6) All versions prior to 6.49.21 (fixed in 6.49.21) · MikroTik RouterOS (Long-term channel, v7) All versions prior to 7.23.4 (fixed in 7.23.4) KEV PoC mass
Unauthenticated Arbitrary File Read in MikroTik RouterOS WebFig (CVE-2026-67281)
RouterOS WebFig's /jsproxy handler contains an unauthenticated file-read flaw: a newly allocated session keeps a stale, uninitialized principal pointer that is later used to authorize file access (CWE-824), combined with a path-traversal issue (CWE-22). An unauthenticated attacker who can reach the web interface first shapes the heap allocator so the uninitialized pointer resolves with sufficient rights, then submits an encrypted URI containing parent-directory components to escape the WebFig file namespace. This lets the attacker read root-owned files on the router, including configuration stores that contain credentials, which could enable further compromise. Only MikroTik RouterOS 7.x before 7.23.4 (Long-term) and 7.24.2 (Stable) is affected. No public proof-of-concept, KEV listing, or confirmed in-the-wild exploitation of this flaw is known (EPSS ~0.4%), although recent reporting notes MikroTik patches being chained in router-hijack campaigns generally.
· MikroTik RouterOS (WebFig /jsproxy) 7.x branch prior to 7.23.4 (Long-term) and 7.24.2 (Stable); fixed in 7.23.4 and 7.24.2mass
Unauthenticated SSH Session Bypass Enables File Writes in MikroTik RouterOS
CVE-2026-67279 is an authentication-ordering flaw (CWE-841) in the SSH server of MikroTik RouterOS: after a client-requested SSH rekey, the server enters the connection protocol even though user authentication was never attempted. An unauthenticated SSH client can therefore open a session channel and send an exec request, and on affected builds the server dispatches the command without any credentials. This lets the attacker create, overwrite, and reconstruct files in the RouterOS managed file namespace, including support files that contain configuration and diagnostic data. Any MikroTik device running RouterOS builds older than the fixed releases is affected, although remote exploitation requires the SSH service to be reachable by the attacker. No public proof-of-concept is known, the issue is not in CISA's KEV catalog, and EPSS estimates a 0.4% probability of exploitation in the next 30 days, so no exploitation is currently known.
· MikroTik RouterOS (Long-term branch, v6) prior to 6.49.21 · MikroTik RouterOS (Long-term branch, v7) prior to 7.23.4mass
X.509 Signature Forgery Enables TLS Impersonation in MikroTik RouterOS 7.x
MikroTik RouterOS 7.x improperly verifies RSA/PKCS#1 v1.5 signatures when validating X.509 certificate chains, accepting malformed signatures (CWE-347, Improper Verification of Cryptographic Signature). Because the RouterOS trust store includes a root CA whose public key uses the small exponent e=3, an attacker who can control or redirect one of the router's outbound TLS connections (for example via a network man-in-the-middle position, DNS hijacking, or a compromised upstream path) can forge an intermediate CA signed with the root's public key, without ever holding its private key, and mint trusted certificates for arbitrary hostnames. This lets the attacker impersonate TLS servers the router connects to, with low confidentiality and integrity impact per the CVSS 4.0 score of 6.3 (medium), which reflects the network vector, no privileges required, but a high attack requirement of holding such a network position. Any deployment running RouterOS 7.x before 7.23.4 (Long-term) or 7.24.2 (Stable) is affected, spanning home/SOHO, enterprise, and ISP/WISP infrastructure; the 6.x branch is not listed as affected. No public proof-of-concept is known, the issue is not in CISA's KEV, and EPSS gives a 0.2% probability of exploitation within 30 days, although related headlines note other MikroTik flaws have recently been chained to hack routers.
· MikroTik RouterOS 7.x before 7.23.4 (Long-term) and before 7.24.2 (Stable); the 6.x branch is not affectedmass
Pre-Auth Static Code Injection RCE in N-able N-central (Exploited in the Wild)
CVE-2026-86218 is a static code injection flaw (CWE-96) in N-able's N-central on-premises remote monitoring and management (RMM) platform, carrying a maximum CVSS 4.0 score of 10.0. An unauthenticated, remote attacker triggers it by sending crafted network input to the N-central server that is improperly neutralized and persisted into application-managed code, which the server then executes — no privileges (PR:N) or user interaction (UI:N) are required. Successful exploitation yields full server compromise with high impact on confidentiality, integrity, and availability, and because N-central acts as the management hub for downstream customer endpoints, compromise can expose the entire managed estate. Any organization running an affected N-central release (before 2026.3.1.14) — primarily MSPs and corporate IT departments using N-able RMM — is affected. The flaw is confirmed exploited in the wild: N-able patched it as a zero-day, CISA added it to the KEV catalog on 2026-09-08, and it is the fourth N-central hotfix in five weeks, though no public PoC is known and ransomware use is unknown.
· N-able N-central before 2026.3.1.14 KEV PoC large
Actively Exploited V8 Type Confusion in Google Chrome (CVE-2026-85046)
Google Chrome versions prior to 152.0.7977.82 contain a type confusion flaw (CWE-843) in the V8 JavaScript engine, which mishandles object types during engine operations (public proof-of-concept writeups indicate it is reachable through array sorting and WebAssembly-related code paths). A remote attacker triggers the flaw simply by getting a user to open a crafted HTML page, with no privileges or authentication required. Successful exploitation lets the attacker execute arbitrary code inside the browser's sandbox, and public reporting shows it being chained with Windows zero-days (the 'BlueMoon' exploit kit) by Chinese espionage groups for broader compromise. Any user of an unpatched Chrome or another build embedding the affected V8 engine is exposed. The vulnerability is a zero-day that was actively exploited in the wild before patching, was added to CISA's KEV on 2026-09-04, and has five public proof-of-concept references.
· Google Chrome prior to 152.0.7977.82 · Google Chromium V8 V8 engine versions bundled with Chrome prior to 152.0.7977.82 KEV PoC ×5mass
Authentication bypass in N-able N-central internal APIs before 2026.3 HF 3
CVE-2026-86207 is an authentication bypass (CWE-305) in N-able's N-central remote monitoring and management (RMM) platform that allows unauthorized access to APIs that are supposed to be internal-only. It is triggered over the network by sending requests to these internal API endpoints under specific conditions (the CVSS vector indicates some attack prerequisites and a low-privilege foothold are required). An attacker who exploits it gains highly privileged access to the N-central server's data and functions, with high impact on confidentiality, integrity and availability of the server itself. Organizations running any N-central release before version 2026.3 Hotfix 3 are affected — primarily managed service providers hosting N-central for their own operations. There is no public proof of concept, the flaw is not in CISA's KEV catalog, and EPSS puts 30-day exploitation risk at just 0.7%; note that the recent news headlines about actively exploited 'unauthenticated RCE' flaws in N-central describe separate vulnerabilities in the same product, which is why multiple hotfixes have shipped in quick succession.
· N-able N-central all versions before 2026.3 HF 3 (Hotfix 3)moderate
Access Control Filter Bypass in N-able N-central Exposes Internal APIs
N-able N-central contains a flaw in the access-control filter that protects its internal API (CWE-791, incomplete filtering), allowing requests to bypass the filter and reach internal APIs without authorization. The issue is exploitable over the network with no privileges and no user interaction, per the CVSS 4.0 vector (AV:N/PR:N/UI:N). An attacker gains unauthorized, low-impact access to internal APIs (VC:L); the vector indicates no integrity or availability impact and no evidence of code execution from this flaw. Any organization running an affected N-central release — a remote monitoring and management (RMM) platform operated by managed service providers — is affected, and the fix is available in N-central 2026.3 HF3 and 2026.4. The flaw is not on the CISA KEV list and has no known public PoC or confirmed in-the-wild exploitation, though it was disclosed in the same patching cycle as actively exploited N-central unauthenticated RCE flaws.
· N-able N-central Releases prior to 2026.3 HF3; fixed in 2026.3 HF3 and 2026.4large
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