Search: “Cisco Secure Firewall Management Center”

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ZDI-26-709: Cisco Secure Firewall Management Center CommandSinkRmi Deserialization of Untrusted Data Remote Code Execution Vulnerability

ZDI disclosed CVE-2026-20242, an unauthenticated deserialization flaw in Cisco Secure Firewall Management Center enabling remote code execution (CVSS 8.1).

ZDI published advisory ZDI-26-709 describing deserialization of untrusted data in Cisco Secure Firewall Management Center's CommandSinkRmi component, tracked as CVE-2026-20242 with CVSS 8.1. Remote attackers can execute arbitrary code on affected installations without authentication. The advisory does not indicate whether exploitation has been observed in the wild.

ZDI Published AdvisoriesSep 16, 05:00 UTC · 1d agoVulnerability 11 sources CVE-2026-20242

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 AdvisoriesSep 16, 16:00 UTC · 22h agoAdvisory in the wild 6 sources

Cisco Warns of New Zero-Day ISE Auth Bypass (CVSS 10.0) Exploited in Active Attacksnew

Cisco warns CVE-2026-76460 (CVSS 10.0), an unauthenticated ISE auth bypass leading to root command execution, is under active exploitation and was added to CISA's KEV.

Cisco warned that CVE-2026-76460 (CVSS 10.0), an insufficient-authentication flaw in an Identity Services Engine (ISE) API endpoint, is being actively exploited by unauthenticated remote attackers and can yield root-privilege command execution on ISE and ISE-PIC regardless of configuration. Fixes shipped across ISE 3.1 through 3.5 patch branches; Cisco advised reviewing access.log for unexpected usernames (e.g., "dummyuser"), re-imaging affected nodes, and using iACLs, since no workarounds exist. CISA added the flaw to its KEV catalog on September 16, 2026, requiring FCEB agencies to patch by September 19. Cisco simultaneously issued 77 new CVEs, 41 affecting ISE and 28 affecting Secure Firewall products, days after confirming active exploitation of CVE-2026-76461 in Secure Email Gateway.

The Hacker News06:39 UTC · 7h agoExploit / PoC in the wildCVE-2026-76460 CVE-2026-76461 CVE-2026-20176+27 CVEs

Cisco patches Secure Email Gateway zero-day exploited in attacks

Cisco patches actively exploited Secure Email Gateway zero-day CVE-2026-76461 enabling unauthenticated root command execution; CISA adds it to KEV.

Cisco disclosed that a critical zero-day (CVE-2026-76461) in the email parsing logic of AsyncOS for Secure Email Gateway is being actively exploited, allowing unauthenticated remote attackers to execute arbitrary SQL statements that lead to root-level command execution on virtual and physical appliances. CISA added the flaw to its KEV catalog and ordered federal agencies to patch within three days, by September 17. Cisco also patched four other critical SEG/SEWM vulnerabilities (CVE-2026-76440, CVE-2026-76441, CVE-2026-20353, CVE-2026-76443) with no evidence of exploitation, and shared IOCs including suspicious SQL statements in mail_logs.

BleepingComputerSep 15, 07:31 UTC · 2d agoExploit / PoC in the wildCVE-2026-76461 CVE-2026-76440 CVE-2026-76441+3 CVEs

Cisco Fixes Dozens of Flaws Across FMC, ISE and Nexus Dashboard

Cisco patches dozens of critical flaws in FMC, ISE and Nexus Dashboard, including ISE bugs and an authentication bypass already exploited in the wild.

Cisco released patches for dozens of critical-severity CVEs in Secure Firewall Management Center, Identity Services Engine and Nexus Dashboard. ISE updates cover 20 CVEs including 12 critical ones; three publicly disclosed flaws (CVE-2026-20282, CVE-2026-20283, CVE-2026-20284) enable SQL injection, data tampering and command execution but require administrative access. FMC patches fix 18 CVEs, eight critical, several shared with ASA and FTD, where CVE-2026-20079 and CVE-2026-20316 have been exploited since August. Cisco also warned of a critical-severity ISE authentication bypass exploited in the wild as a zero-day.

SecurityWeek12:17 UTC · 1h agoVulnerability in the wild 8 sources CVE-2026-20282 CVE-2026-20283 CVE-2026-20284+3 CVEs

Hackers Exploit Critical Cisco Secure Email Gateway Vulnerability in the Wild to Run Malicious Code

Cisco warns attackers actively exploit zero-day CVE-2026-76461 in Secure Email Gateway, gaining unauthenticated root command execution via crafted emails.

Cisco PSIRT confirmed active in-the-wild exploitation of CVE-2026-76461 throughout September 2026, a zero-day in Secure Email Gateway AsyncOS that lets remote, unauthenticated attackers execute arbitrary commands with root privileges by sending maliciously crafted emails containing injected SQL statements. Physical appliances, virtual deployments, and Cisco Secure Email Cloud instances were affected; Cisco deployed server-side remediations for cloud tenants but on-premises admins must patch themselves. Fixes ship in AsyncOS 16.5.0-780 plus branches 16.0.4-3021 and 15.5.5-0141, and no workarounds exist.

Cyber Security Newsupdated Sep 16, 13:57 UTC · 1d agofirst Sep 15, 04:14 UTC · 2d agoExploit / PoC in the wild 17 sources CVE-2026-76461

Weekly Cybersecurity Newsletter – Top 50 Biggest Cybersecurity Stories of the Week

GBHackers weekly digest rounds up 50 stories including Microsoft's 973-CVE patch drop, exploited Cisco FMC flaws, and Claude agent attacks.

GBHackers' September 7-12, 2026 newsletter summarizes the 50 biggest cybersecurity stories of the week. Highlights include Microsoft patching a record 973 CVEs with two exploited zero-days, active exploitation of Cisco FMC, Check Point VPN and Ivanti flaws, China-linked crews chaining Chrome and Windows zero-days, AI agents mass-exploiting PaperCut to compromise 440 servers, and the emergence of Panzer cross-platform ransomware. It also covers Anthropic and OpenAI agentic AI incidents and CrowdStrike's SafeMind launch.

GBHackersSep 15, 11:44 UTC · 2d agoIndustry in the wild

Cisco drops another exploited zero-day, this time a perfect 10

Cisco's CVSS 10.0 CVE-2026-76460 authentication bypass in Identity Services Engine is actively exploited, granting unauthenticated attackers root command execution.

Cisco disclosed CVE-2026-76460 (CVSS 10.0), an authentication bypass in Identity Services Engine (ISE) and ISE-PIC APIs that gives unauthenticated remote attackers command execution with root privileges; CISA added it to the KEV catalog. It follows CVE-2026-76461 (CVSS 9.8), an actively exploited flaw in Cisco Secure Email Gateway and Secure Email and Web Manager disclosed days earlier. Permanent fixes ship in ISE 3.1 Patch 12 through 3.5 Patch 4; ISE 3.0 is end-of-maintenance and ISE 3.1 Patch 12, 3.2 Patch 11, 3.3 Patch 12, 3.4 Patch 7 and 3.5 Patch 4 are available. No workaround exists, though ACLs restricting management traffic can serve as temporary mitigation.

The Register · Securityupdated 13:46 UTC · 15m agofirst 12:40 UTC · 1h agoExploit / PoC in the wild 22 sources CVE-2026-76460 CVE-2026-764611