Search: “Cisco ASA”

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software SSL VPN Denial of Service Vulnerability

Cisco expanded an SSL VPN denial-of-service advisory to cover all ASA and FTD software platforms; unauthenticated attackers can exhaust device memory.

A vulnerability in the VPN and management web servers of Cisco ASA Software and Cisco Secure FTD Software allows an unauthenticated remote attacker to exhaust system memory or buffer blocks, causing a denial of service. Originally scoped to the ASAv and FTDv virtual appliances, Cisco updated the advisory on September 16, 2026 to cover all ASA and FTD platforms.

Cisco Security Advisories·Sep 16, 16:05 UTC · 18h agoAdvisory 9 sources

U.S. CISA adds Cisco Secure Email Gateway flaw to its Known Exploited Vulnerabilities catalog

CISA added actively exploited Cisco Secure Email Gateway zero-day CVE-2026-76461 (CVSS 9.8) to KEV; federal agencies must patch by September 17, 2026.

CISA added CVE-2026-76461 (CVSS 9.8), a critical zero-day in Cisco AsyncOS for Cisco Secure Email Gateway, to its Known Exploited Vulnerabilities catalog. The flaw stems from insufficient validation in email parsing, letting an unauthenticated remote attacker send a crafted email with malicious SQL statements to achieve arbitrary command execution with root privileges. Cisco confirmed active exploitation in the wild, notes no workarounds exist, and recommends checking mail_logs for suspicious SQL statements like 'COPY.*TO PROGRAM' on every cluster device. Under BOD 22-01, FCEB agencies must remediate by September 17, 2026.

Security Affairs·updated Sep 16, 13:57 UTC · 20h ago·first Sep 15, 20:46 UTC · 1d agoExploit / PoC in the wild 17 sourcesCVE-2026-76461

Cisco FMC CVE-2026-20079 Actively Exploited

Cisco confirms active exploitation of CVE-2026-20079, a maximum-severity authentication bypass in Secure Firewall Management Center.

Cisco has confirmed that CVE-2026-20079, a critical authentication bypass in Cisco Secure Firewall Management Center (FMC), is being actively exploited in the wild. The vulnerability carries a maximum CVSS severity, and defenders are urged to treat it as an urgent patch priority. FMC centrally manages Cisco Secure Firewall deployments, so exposure across enterprise environments is likely.

SOCRadar·updated 09:33 UTC · 39m ago·first Sep 10, 12:28 UTC · 6d agoExploit / PoC in the wild 14 sourcesCVE-2026-20079

Cisco ASA and FTD Flaw Exploited in the Wild Can Trigger Remote DoS

Cisco warns actively exploited flaw CVE-2026-20349 lets unauthenticated attackers crash ASA and FTD firewalls via SSL VPN; CISA added it to KEV.

Cisco fixed CVE-2026-20349 (CVSS 8.6) in Secure Firewall ASA and FTD software, insufficient error checking in HTTP request processing that lets unauthenticated remote attackers force device reloads via crafted requests to the Remote Access SSL VPN service. Hotfixes cover ASA 9.16 through 9.24 and FTD 7.0 through 10.0, and there are no workarounds; Cisco confirmed active exploitation earlier in August but did not name the actor or targets. The flaw was found during internal security testing. CISA added it to the KEV catalog, requiring federal civilian agencies to patch by August 14, 2026.

The Hacker News·Aug 12, 06:15 UTC · Aug 12, 2026Exploit / PoC in the wildCVE-2026-20349

Cisco ASA and FTD DoS Vulnerability Exploited in the Wild (CVE-2026-20349)

Cisco patched actively exploited high-severity flaw CVE-2026-20349 in ASA and FTD SSL VPN services, allowing unauthenticated remote denial-of-service attacks.

Cisco released a security advisory addressing CVE-2026-20349, a high-severity vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall ASA and FTD Software. Successful exploitation by an unauthenticated remote attacker can cause affected devices to crash or reload, causing denial of service. The vulnerability is being exploited in the wild, and patches are available; organizations with internet-exposed ASA/FTD VPN endpoints should prioritize updating.

Qualys ThreatPROTECT·Aug 13, 09:47 UTC · Aug 13, 2026Exploit / PoC in the wildCVE-2026-20349

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability

Cisco patched an unauthenticated remote DoS in ASA and FTD Remote Access SSL VPN that reloads devices via crafted HTTP requests.

Cisco disclosed a denial-of-service vulnerability in the Remote Access SSL VPN service of Secure Firewall ASA and FTD software. Insufficient error checking when processing HTTP requests allows an unauthenticated, remote attacker to send a crafted HTTP request that causes the affected device to reload. Cisco has released software updates addressing the flaw.

Cisco Security Advisories·Aug 11, 16:39 UTC · Aug 11, 2026Advisory

Cisco fixes vulnerability exploited to DoS its firewalls (CVE-2026-20349)

Cisco patches CVE-2026-20349, a high-severity unauthenticated DoS in ASA and FTD VPN services now added to CISA's KEV.

CVE-2026-20349 affects the Remote Access SSL VPN service in Cisco Secure Firewall ASA and FTD software, where specially crafted unauthenticated HTTP requests can cause appliances to reload, creating a denial of service. Cisco confirmed active exploitation observed in August 2026 and released hot fixes for ASA versions 9.16 through 9.24 and FTD versions 7.0 through 10.0. The flaw was added to CISA's Known Exploited Vulnerabilities catalog with a remediation deadline of August 14, 2026 for US civilian federal agencies. No workarounds or indicators of compromise are available.

Help Net Security·Aug 13, 00:00 UTC · Aug 13, 2026Exploit / PoC in the wildCVE-2026-20349

Cisco security advisory (AV26-197) – Update 3

CISA added Cisco CVE-2026-20079 to its KEV catalog; the Canadian Cyber Centre urges updates across Secure Firewall ASA, FTD, FMC, and SCC products.

The Canadian Centre for Cyber Security updated advisory AV26-197 covering March 2026 Cisco advisories for Security Cloud Control, Secure Firewall Management Center, ASA, and FTD. Cisco confirmed CVE-2026-20131 was actively exploited on March 18, 2026, and CISA added it to KEV on March 19. In Update 3, dated September 9, 2026, CISA added CVE-2026-20079 to the KEV catalog. The underlying flaws include FMC authentication bypass and remote code execution, ASA TCP-flood denial of service, and ASA/FTD IPsec denial of service.

Canadian Centre for Cyber Security·Sep 9, 20:04 UTC · 7d agoExploit / PoC in the wildCVE-2026-20131CVE-2026-20079

U.S. CISA adds Metabase, Windows, and Cisco Secure Firewall flaws to its Known Exploited Vulnerabilities catalog.

CISA adds three actively exploited flaws—Cisco ASA/FTD DoS, Windows Winsock SYSTEM-level UAF, and Metabase SQL injection—to its Known Exploited Vulnerabilities catalog.

CISA added CVE-2026-20349 (CVSS 8.6, heap inspection flaw crashing Cisco ASA/FTD via crafted HTTP requests to the Remote Access SSL VPN service), CVE-2026-68820 (CVSS 7.0, use-after-free in the Windows afd.sys Winsock driver allowing SYSTEM-privilege code execution, actively exploited per Microsoft) and CVE-2026-72898 (CVSS 10.0, unauthenticated SQL injection in Metabase) to the KEV catalog. Metabase disclosed its cloud service was attacked with the 0-day, giving the intruder a path to administrator rights and stored credentials for connected databases; cloud instances were patched while self-hosted deployments need urgent updates. Under BOD 22-01, federal civilian agencies must patch by August 14, 2026, except CVE-2026-68820, due August 25.

Security Affairs·Aug 18, 18:15 UTC · 29d agoExploit / PoC in the wildCVE-2026-20349CVE-2026-68820CVE-2026-728981

Cisco Secure Firewall Adaptive Security Appliance, Secure Firewall Threat Defense, and Secure Firewall Management Center Software Hardening Release: September 2026

Cisco's September 2026 firewall hardening release fixes internally found ASA, FTD, and FMC flaws, two of which are actively exploited.

Cisco released September 2026 hardening updates for Secure Firewall ASA, FTD, and FMC software addressing multiple vulnerabilities discovered during a comprehensive internal security review. Two of the vulnerabilities are known to be actively exploited, including a Cisco Secure Firewall Management Center static credential vulnerability. Details are provided in separate linked advisories.

Cisco Security Advisories·Sep 16, 16:00 UTC · 18h agoAdvisory in the wild 6 sources

AL26-020 - Vulnerabilities Impacting MikroTik RouterOS - CVE-2026-67276, CVE-2026-67277 and CVE-2026-86060

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.

Canadian Centre for Cyber Security·updated Sep 11, 11:57 UTC · 5d ago·first Sep 10, 19:50 UTC · 6d agoVulnerability in the wild 2 sourcesCVE-2026-67276CVE-2026-67277CVE-2026-860603· 2 reads

Cisco Advance Notification for Publication of September 16, 2026, Security Advisories

Cisco will publish security advisories with fixed software on September 16, 2026, covering BroadWorks, ISE, Nexus Dashboard, ASA, FMC, FTD and ThousandEyes.

Cisco PSIRT announced advance notification for security advisories to be published on September 16, 2026, along with fixed software releases. Affected products include BroadWorks CommPilot Application Software, Identity Services Engine (ISE), Nexus Dashboard, Secure Firewall ASA, Secure Firewall Management Center (FMC), Secure Firewall Threat Defense (FTD), and ThousandEyes Virtual Appliance. ISE, Nexus Dashboard and the Secure Firewall products receive security hardening releases, and the ASA, FMC and FTD advisories will be included in the same combined release.

Cisco Security Advisories·Sep 9, 16:00 UTC · 7d agoAdvisory

China's 'Fire Ant' campaign used compromised Cisco routers as platform for more attacks

Sygnia links the China-nexus Fire Ant campaign to UNC3886, showing hackers weaponized compromised Cisco IOS XR routers for espionage and wider intrusions.

Sygnia's Fire Ant report details Chinese hackers compromising Cisco IOS XR routers, TACACS+ authentication servers and management infrastructure to capture traffic, harvest credentials and stage attacks on high-value and critical infrastructure networks. The group, which overlaps with Mandiant's UNC3886, developed custom router malware for persistence, hid logs, deleted files and tampered with firewall rules, and remained active in 2026 after Sygnia's 2025 disclosure. The activity aligns with prior Chinese campaigns against Cisco devices, including Volt Typhoon and Salt Typhoon operations.

The Record·Sep 1, 20:41 UTC · 15d agoThreat actor

August 2026 CVE Landscape

Insikt Group catalogs 73 high-impact August 2026 CVEs (43 Very Critical), including PaperCut, Zimbra, and Metabase flaws actively exploited or weaponized.

Recorded Future's Insikt Group identified 73 high-impact vulnerabilities in August 2026, 43 rated Very Critical, spanning 45 vendors with Microsoft accounting for roughly 11%. 31 vulnerabilities surfaced via CISA's KEV catalog, with others validated via open sources, vendor telemetry, and honeypot data. New Nuclei detection templates were released for CVE-2025-62593 (Ray), CVE-2026-72898 (Metabase), and CVE-2026-9198 (IBM Langflow). The report also highlights two AI-assisted operations: UAT-10147 exploited Zimbra, AjaxPro, Nacos, and Telerik servers before using DeepAudit and PentestGPT post-compromise, while a separate Chinese-speaking actor weaponized Hermes Agent and DeepSeek in a failed attempt.

Recorded Future·Sep 8, 00:00 UTC · 9d agoVulnerability in the wildCVE-2025-62593CVE-2026-72898CVE-2026-9198+4 CVEs1

Cisco Patches Nine Crosswork and Secure Workload Flaws, Five Scoring CVSS 10.0

Cisco patches nine Crosswork and Secure Workload flaws, five rated CVSS 10.0, found internally with no exploitation observed.

Cisco released fixes for four Crosswork platform vulnerabilities including CVE-2026-20030 SQL injection and CVE-2026-20357 missing authentication, both scoring CVSS 10.0, affecting Crosswork Release 7.2.1 and earlier. Five additional flaws in Secure Workload, including CVE-2026-20315 and CVE-2026-20317 at CVSS 10.0, affect SaaS and on-premises deployments up to releases 3.10 and 4.0. All issues were found through internal testing and are not known to be actively exploited. The patches follow a broader internal security review that recently addressed 12 Catalyst SD-WAN and IOS XE bugs.

The Hacker News·Aug 21, 10:03 UTC · 27d agoVulnerabilityCVE-2026-20030CVE-2026-20357CVE-2026-20358+7 CVEs

September 2026 Patch Tuesday roundup: Plugs for two zero day holes among almost 1,000 fixes in Windows

Microsoft's September 2026 Patch Tuesday ships 964 fixes including two exploited Windows zero-days (CVE-2026-85880, CVE-2026-81963) and a wormable DNS RCE.

Microsoft's September 2026 Patch Tuesday includes 964 Microsoft vulnerabilities requiring customer action, a record attributed to AI-assisted bug discovery, plus 174 third-party/open-source and 23 Chromium/Edge CVEs. Two zero-days are exploited in the wild: CVE-2026-85880, a Windows ALPC heap overflow enabling AppContainer sandbox escape and privilege escalation, and CVE-2026-81963, a Windows Update Stack escalation to SYSTEM. CVE-2026-69730, an unauthenticated Windows DNS RCE, is not yet exploited but Microsoft expects exploitation, and roughly 20 bugs could be wormable. Separately, SAP issued a critical CVSS 10.0 fix for the EPP component used in S/4HANA and NetWeaver.

CSO Online·Sep 9, 03:27 UTC · 8d agoVulnerability in the wildCVE-2026-85880CVE-2026-81963CVE-2026-69730+2 CVEs1

Organizations Warned of Cisco Secure FMC Exploitation

Cisco and CISA warn that critical FMC authentication bypass CVE-2026-20079 is actively exploited; CISA added it to the KEV catalog with a September 12 deadline.

Cisco and CISA flagged active exploitation of CVE-2026-20079, a critical authentication bypass in Cisco Secure Firewall Management Center allowing remote, unauthenticated attackers to run malicious scripts and gain root access via crafted HTTP requests. Cisco patched the flaw in early March and added IoCs in late July, but confirmed active exploitation in its September 9 advisory; CISA added it to the KEV catalog requiring federal remediation by September 12. Talos identified three activity clusters exploiting CVE-2026-20079 and CVE-2026-20316, including state-sponsored and financially motivated actors, and this is the third FMC vulnerability in KEV this year after CVE-2026-20316 and CVE-2026-20131.

SecurityWeek·Sep 10, 10:06 UTC · 7d agoExploit / PoC in the wildCVE-2026-20079CVE-2026-20316CVE-2026-20131

Cisco Integrated Management Controller Argument Injection Vulnerabilities

Cisco patched multiple argument-injection vulnerabilities in Cisco IMC's web management interface allowing authenticated attackers root command execution.

Cisco published an advisory covering multiple argument injection vulnerabilities in the web-based management interface of Cisco Integrated Management Controller (IMC). An authenticated, remote attacker could exploit them to execute arbitrary commands on the underlying operating system and elevate privileges to root. Cisco released software updates and states there are no workarounds; the advisory carries a High Security Impact Rating.

Cisco Security Advisories·Sep 15, 20:36 UTC · 1d agoAdvisory1

Cisco confirms CVE-2026-20079 Secure FMC flaw exploited in attacks

Cisco confirmed active exploitation of CVE-2026-20079, a CVSS 10.0 authentication bypass enabling unauthenticated root command execution in Secure FMC; CISA added it to KEV.

Cisco confirmed in August 2026 that CVE-2026-20079 (CVSS 10.0), an unauthenticated authentication bypass in Secure Firewall Management Center, is being actively exploited, allowing remote attackers to execute scripts and commands as root via crafted HTTP requests to the web interface. CISA added the flaw to its Known Exploited Vulnerabilities catalog, ordering federal civilian agencies to patch by September 12, 2026. Shared IOCs, identical hot fixes, and a July 23 log entry suggest CVE-2026-20079 was used alongside the separately exploited static-credential flaw CVE-2026-20316 in the same attacks. Cisco released patches and cloud fixes, warns hot fixes do not remediate already-compromised devices, and says there are no workarounds.

BleepingComputer·Sep 9, 21:40 UTC · 7d agoExploit / PoC in the wildCVE-2026-20079CVE-2026-20316

[Webinar] Tales from the Frontlines: An exclusive briefing on Q2 incidents

Cisco Talos·Aug 3, 16:00 UTC · Aug 3, 2026Ransomware

Active Exploitation Triggers Emergency Patch for Cisco ISE Zero-Day

Cisco urgently patched actively exploited zero-day CVE-2026-76460 (CVSS 10.0), an ISE authentication bypass enabling root command execution; CISA added it to KEV.

Cisco released emergency patches for CVE-2026-76460 (CVSS 10.0), a zero-day authentication bypass in an API endpoint of Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC), and confirmed active exploitation in the wild. Successful exploitation lets attackers bypass the web-based management interface and execute commands with root privileges, allowing them to hide or delete indicators of compromise. Fixed releases are ISE/ISE-PIC 3.5 Patch 4, 3.4 Patch 7, 3.3 Patch 12, 3.2 Patch 11, and 3.1 Patch 12; no workarounds exist beyond restricting traffic with infrastructure ACLs. CISA added the flaw to its Known Exploited Vulnerabilities catalog, giving US federal agencies three days to patch under BOD 26-04.

SecurityWeek·updated 10:06 UTC · 7m ago·first 06:19 UTC · 3h agoExploit / PoC in the wild 18 sourcesCVE-2026-76460

Cisco Packaged Contact Center Enterprise and Cisco Unified Contact Center Enterprise Server-Side Request Forgery Vulnerability

Cisco patched an authenticated SSRF flaw in Packaged CCE and Unified CCE that lets credentialed users send arbitrary network requests from affected devices.

A server-side request forgery vulnerability caused by improper input validation of specific HTTP requests affects Cisco Packaged Contact Center Enterprise and Cisco Unified Contact Center Enterprise. An authenticated, remote attacker with valid user credentials can send crafted HTTP requests to make the device issue arbitrary network requests. Cisco has released software updates; no exploitation is reported in the advisory.

Cisco Security Advisories·Aug 19, 16:00 UTC · 28d agoAdvisory

Cisco FMC Zero-Day Actively Exploited, Static Credentials Could Expose Sensitive Data

The Hacker News·Aug 6, 16:41 UTC · Aug 6, 2026Exploit / PoC in the wildCVE-2026-20316CVE-2026-20079

Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability

Cisco released a fix for a management-plane flooding DoS in IE-1000 switches that can make the device manager, SSH, or API inaccessible.

Insufficient protection against management plane flooding in Cisco Industrial Ethernet 1000 Series Switches allows an unauthenticated remote attacker to send high-rate ICMP, SSH, or HTTP traffic, raising CPU usage and causing a denial-of-service condition on the device manager web GUI, SSH, or API. Data traffic through the device is not affected. Cisco has released software updates to address the issue.

Cisco Security Advisories·Aug 19, 16:00 UTC · 28d agoAdvisory