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Poland's CERT Warns of Active Exploitation of Critical Zimbra Collaboration Suite Flaw

CERT Polska confirms active exploitation of critical unauthenticated RCE CVE-2026-73570 in Zimbra Collaboration Suite, patched July 20.

CERT Polska confirmed threat actors are actively exploiting CVE-2026-73570, an unauthenticated OS command injection in Zimbra Collaboration Suite allowing arbitrary shell commands as the zimbra user. Exploitation requires the SNMP trap service via snmp_notify with swatchdog running, which is enabled by default; Shadowserver tracks over 12,100 internet-exposed Zimbra servers. Zimbra fixed the flaw in version 10.1.20 on July 20, 2026, 28 days before exploitation was confirmed. Historical Zimbra targeting includes Winter Vivern, APT29, and APT28 campaigns.

Security Affairs · 26d agoExploit / PoC in the wildCVE-2026-73570

MikroTik Patches Critical Flaws Chained to Hack Routers

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.

SecurityWeek · 8d agoExploit / PoC in the wildCVE-2026-67276CVE-2026-67277CVE-2026-67278+3 CVEs1

U.S. CISA adds Zimbra Collaboration Suite (ZCS) flaw to its Known Exploited Vulnerabilities catalog

CISA added actively exploited Zimbra flaw CVE-2026-73570 (unauthenticated OS command injection RCE) to its KEV catalog, setting an August 24, 2026 federal patch deadline.

CISA added CVE-2026-73570, an unauthenticated OS command injection flaw in Zimbra Collaboration Suite, to its Known Exploited Vulnerabilities catalog after CERT Polska confirmed active exploitation. The flaw lets attackers execute shell commands as the zimbra user via the snmp_notify parameter when the SNMP trap service is enabled and the default swatchdog service is running. Zimbra patched the issue in version 10.1.20 released July 20, 2026, 28 days before exploitation was confirmed. Under BOD 22-01, federal civilian agencies must patch by August 24, 2026.

Security Affairs · 25d agoExploit / PoC in the wildCVE-2026-73570

Hackers exploit RouterOS flaws to hijack MikroTik devices without authentication

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.

Help Net Security · 9d agoExploit / PoC in the wildCVE-2026-67276CVE-2026-86060CVE-2026-67277

Russian-Linked Hackers Accessed Polish Power Plant OT Network Through Private APN, Says CERT.PL

CERT.PL disclosed that Russian-linked hackers accessed a Polish combined heat and power plant's OT network through a private APN in 2025.

Poland's CERT (CERT.PL) released details of a 2025 attack on a Polish combined heat and power plant. Russian-linked hackers accessed the plant's OT network through a private APN. The disclosure adds to a series of intrusions against Polish critical infrastructure attributed to Russian-linked actors.

Infosecurity Magazine · Aug 12, 2026Threat actor in the wild

Risky Bulletin: Academics find source code overlaps between Geedge and China's Great Firewall

Academics linked Chinese vendor Geedge Networks' Tiangou Secure Gateway source code to one of the Great Firewall's three traffic filtering capabilities.

US researchers presenting at USENIX Security reconstructed Geedge Networks' Tiangou Secure Gateway firmware from over 100,000 leaked files, including Git repositories with commit history, and matched its filtering behavior to sections of China's Great Firewall. They found only 1 of 3 characterized DNS injectors matched Geedge code, noted the system relies on memory-unsafe C components and copied third-party code, and said its bugs could aid future circumvention tools. Geedge also exports censorship tools to Kazakhstan, Ethiopia, Pakistan, and Myanmar. The newsletter additionally rounds up multiple breaches.

Risky Business News · 26d agoResearch2

Hackers exploit new MikroTik RouterOS flaws to hijack routers

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.

BleepingComputer · 9d agoExploit / PoC in the wildCVE-2026-67276CVE-2026-86060CVE-2026-67277

Wzmacniamy w Polsce ochronę przed oszustwami

Meta announces expanded anti-scam protections in Poland, citing rising fraud across dating apps, crypto platforms, online games and SMS messaging.

Meta says it is investing in new technologies and partnerships to better detect and fight scam content across its platforms in Poland. The company notes scam activity spans social platforms, dating apps, online games, cryptocurrency services and SMS messages. It also claims a recent campaign is distorting the picture of Meta's actions and motivations.

Meta Newsroom · 19d agoPhishing & fraud

Risky Bulletin: BEC campaign steals €35 million from French notaries

Hackers stole over €35 million from 500+ French notary offices in a four-year BEC campaign; ANSSI spent two years helping evict the attackers.

A business email compromise campaign breached more than 500 French notary offices — about 7% of all French notaries per the Conseil Supérieur du Notariat — over four years, stealing more than €35 million by phishing initial access and silently modifying wire transfer details. France's cybersecurity agency ANSSI worked for two years behind the scenes to help notaries remove the persistent attackers, who had deep access; officials also feared hackers could issue fake notarized acts such as marriage certificates or forged real estate deals. No forged documents have been found so far, but notaries have added two-factor authentication and in-person requirements for banking details, and banks added extra checks in 2024. The newsletter also notes other incidents, including a $320 million Bitcoin extraction from Blockstream's Liquid Network and a JetBrains Cadence breach via TeamCity servers.

Risky Business News · 9d agoPhishing & fraud in the wild1

Poland probes MyDr healthcare software breach potentially affecting 19 million people

Poland investigates a breach at healthcare software firm MyDr potentially exposing data of nearly 19 million people and over 12,000 medical facilities.

Polish healthcare software provider MyDr disclosed a cyberattack that may have exposed personal and medical data belonging to nearly 19 million people and more than 12,000 medical facilities. Hackers obtained unauthorized access to historical data held through April 2024, but the company has found no evidence the data has been published. As a precaution, Poland's e-Health Center is replacing digital certificates used by medical systems to connect to the national P1 e-health platform. The Personal Data Protection Office plans to inspect MyDr and security agencies are working to identify those responsible; no threat actor has been attributed.

The Record · 29d agoData breach in the wild

Cyberattack on logistics giant Ceva hits retailers and Steam customers across Europe

Cyberattack on Ceva Logistics disrupted eight European warehouses, delaying shipments for Bol, De Bijenkorf, Ajax and exposing Steam hardware buyers' data.

A cyberattack on Ceva Logistics disrupted operations at eight European warehouses, delaying shipments for Bol, De Bijenkorf, Ace & Tate, Ajax and Steam hardware customers. Attackers accessed two Ceva systems processing Bol orders, potentially exposing names, addresses, phone numbers, email addresses and order details. Valve began notifying European Steam customers whose hardware shipping data may have been compromised and is contacting data protection authorities. Ceva, with about 110,000 employees and over 1,700 facilities, has not disclosed the attackers or whether ransomware was involved.

The Record · Aug 11, 2026Data breach in the wild

Attackers Hijack MikroTik Routers Through Internet-Exposed SSH Without Authentication

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.

The Hacker News · 10d agoExploit / PoC in the wild

MikroTik router flaws allow takeover without a password

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.

Malwarebytes Labs · 8d agoExploit / PoC in the wildCVE-2026-67276CVE-2026-860603

Researchers Use Claude to Port Pre-Auth RCE Exploit From One PLC Model to Another

Forescout used Anthropic's Claude to port a working pre-auth RCE exploit for CVE-2021-31886 between WAGO PLCs, executing ARM shellcode on live hardware.

Forescout Vedere Labs used Claude interactively to port an RCE exploit for CVE-2021-31886, a CVSS 9.8 stack buffer overflow in the Nucleus FTP server's USER command, from a WAGO 750-852 to a WAGO 750-831 PLC, running attacker-supplied ARM shellcode. The final RCE stage cost $535.74 in API usage over 8 hours 32 minutes, and a follow-up attempt to build a C2 implant permanently bricked the device. CERT@VDE lists many Nucleus V1-based WAGO models as vulnerable with no updates available; Siemens plans no Nucleus NET remediation. The work follows a joint NSA/CISA/FBI/DOE/EPA advisory warning of AI-generated exploitation scripts targeting internet-exposed Siemens S7 PLCs.

The Hacker News · 14d agoResearchCVE-2021-318862

CVE-2026-52307: Stored XSS in 1CMS v5.6

CVE-2026-52307: authenticated stored XSS in 1CMS (ClassCMS) v5.6 Column Management lets attackers inject scripts via the title field.

ClassCMS 1CMS v5.6 contains an authenticated stored cross-site scripting vulnerability, CVE-2026-52307, in the Column Management component. Attackers can execute arbitrary web scripts or HTML by injecting a crafted payload into the title field. No CVSS score, patch information, or exploitation evidence was provided in the disclosure.

Full Disclosure · 7d agoVulnerabilityCVE-2026-52307

Siemens Teamcenter

Reflected XSS in Siemens Teamcenter /auth/ redirect flow lets unauthenticated attackers inject JavaScript into authenticated sessions (CVE-2026-58113).

CISA republished Siemens advisory SSA-157465 for CVE-2026-58113, a reflected cross-site scripting flaw (CVSS 6.1) in the /auth/ authentication redirect flow of Siemens Teamcenter V2412, V2506, V2512, and V2606. An unauthenticated attacker can craft a URL that injects arbitrary JavaScript into an authenticated user's browser, enabling data theft or actions within the victim's Teamcenter session. Fixed versions are available for all affected releases; Enzo Alvarez of Bishop Fox reported the vulnerability.

CISA Advisories · 1d agoAdvisoryCVE-2026-58113

Nearly 1 in 10 Exposed LiteLLM Gateways Accepted the Example "sk-1234" Admin Key

Wiz found 294 of 3,074 internet-facing LiteLLM gateways accepted the documented default admin key sk-1234, exposing provider API keys and cloud IAM credentials.

Wiz Research's February Shodan scan found 3,074 LiteLLM gateways, 294 of which accepted the setup guide's sk-1234 admin key; 191 had no master key set and would accept any credential. The master key doubles as the authentication switch, and before 1.82.0-stable a gateway started without one granted every request full admin rights, exposing stored provider API keys, prompts, and MCP-connected tools. A documented pass-through endpoint lacks checks against private and cloud metadata addresses, letting an admin-key holder retrieve cloud IAM credentials, though no real-world abuse is reported. Related LiteLLM flaws include CVE-2026-59821 (disputed guardrail code execution), CVE-2026-59822 (CVSS 8.8, added to CISA KEV on September 2 and observed against Wiz honeypots), and CVE-2026-42271, used to install a cryptominer.

The Hacker Newsupdated · 5d agofirst · 6d agoVulnerability in the wild 4 sourcesCVE-2026-59821CVE-2026-59822CVE-2026-42271+2 CVEs

CISA Warns of Zimbra OS Command Injection Vulnerability Active Exploitation (CVE-2026-73570)

CISA added actively exploited Zimbra OS command injection flaw CVE-2026-73570 to its KEV catalog, urging users to patch by August 24, 2026.

CISA warned that Zimbra vulnerability CVE-2026-73570 is being actively exploited in the wild and added it to its Known Exploited Vulnerabilities Catalog. The OS command injection flaw resides in the SNMP monitoring component and is exploitable when SNMP notifications are enabled. Users, including US federal agencies subject to BOD deadlines, were urged to apply fixes before the August 24, 2026 deadline. Qualys ThreatPROTECT published tracking coverage of the KEV addition.

Qualys ThreatPROTECT · 22d agoExploit / PoC in the wildCVE-2026-73570

US Defense Contractors Admit Their Rising CMMC Scores May Not Be Accurate

US defense contractors report rising self-assessed CMMC Phase I scores while doubting the accuracy of those self-evaluations.

Self-assessment scores under the US Department of Defense's Cybersecurity Maturity Model Certification (CMMC) Phase I have reportedly reached an all-time high. Contractors themselves doubt whether these self-reported scores accurately reflect their real security maturity. The uncertainty highlights concerns about the reliability of self-assessments in the program's initial phase.

Infosecurity Magazine · 26d agoPolicy & legal

ZDI-26-629: Microsoft Azure Entra ID OAuth Device Code Grant Information Disclosure Vulnerability

Zero Day Initiative disclosed an unauthenticated information disclosure vulnerability (CVSS 5.8) in Microsoft Azure Entra ID's OAuth device code grant flow.

ZDI published advisory ZDI-26-629 describing an information disclosure vulnerability in Microsoft Azure Entra ID related to the OAuth device code grant. Remote attackers can disclose sensitive information without authentication. ZDI assigned a CVSS 3.1 score of 5.8; no CVE identifier is listed in the advisory text.

ZDI Published Advisories · 7d agoAdvisory1

VU#431093: TCG TPM 2.0 reference code found vulnerable to information leakage and timing side-channel attacks

CERT/CC discloses two TPM 2.0 reference code flaws allowing RSA key decryption and forged TPM attestations via crafted commands.

CERT/CC published VU#431093 covering two vulnerabilities in the TCG TPM 2.0 reference implementation: CVE-2026-6726 (information leakage via falsified TPM keys) and CVE-2026-6727 (timing side-channel in RSA OAEP decryption). An attacker with privileged access to a TPM command interface could send crafted TPM commands to decrypt ciphertexts for affected TPM-managed RSA keys, including the RSA Endorsement Key, or obtain credentials enabling forged TPM 2.0 attestations. Remediation is tracked in TCGVRT010 and TCGVRT0011.

CERT/CC Vulnerability Notes · Aug 11, 2026VulnerabilityCVE-2026-6726CVE-2026-6727

CEVA Logistics Cyberattack Disrupts European Warehouses and Shipments

Cyberattack on CEVA Logistics disrupted eight European warehouses and exposed customer data of clients including Valve, Ajax, and De Bijenkorf.

CEVA Logistics, part of CMA CGM Group, suffered a July 29 cyberattack that disrupted eight European warehouses and halted shipments of stored goods. Customer data linked to Valve, Ajax, and Dutch retailer De Bijenkorf was exposed, potentially including names, contact details, and online order information; Valve said payment details and passwords were not accessed. No ransomware group has claimed responsibility and the company has not disclosed technical details. A database containing customer lists, shipping records, and banking details was reportedly later offered for sale on a dark web marketplace.

Security Affairs · Aug 12, 2026Data breach in the wild