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Cisco security advisory (AV26-921)
Canadian Cyber Centre warns actively exploited Cisco Secure Email Gateway SQL injection CVE-2026-76461 was added to CISA's KEV database.
The Canadian Centre for Cyber Security advisory AV26-921 (September 14, 2026) covers a SQL injection vulnerability in Cisco Secure Email Gateway (AsyncOS) and Secure Email and Web Manager. Affected versions include AsyncOS/Secure Email Gateway prior to 15.5.5-014, 16.0.4-302, and 16.5.0-780, and Secure Email and Web Manager prior to 15.5.5-006 and 16.5.0-429. Cisco stated CVE-2026-76461 is being actively exploited, and CISA added it to the Known Exploited Vulnerabilities database the same day. Users and administrators are urged to apply updates as they become available.
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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.
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Cisco Identity Services Engine Hardening Release: September 2026
Cisco ISE hardening release fixes multiple internally discovered vulnerabilities, including an authentication bypass known to be actively exploited.
Cisco released September 2026 hardening updates for Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) following a comprehensive internal security review that uncovered multiple vulnerabilities. One of the flaws, an ISE authentication bypass, is known to be actively exploited. Cisco grouped the issues by underlying vulnerability to help customers prioritize patching and streamline disclosure.
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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.
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Cisco Secure Firewall Management Center Software Authentication Bypass Vulnerability
Cisco warns of a critical authentication bypass in Secure Firewall Management Center that lets unauthenticated attackers execute scripts and obtain root access.
A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software allows an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system. The flaw stems from an improper system process created at boot time and is triggered via crafted HTTP requests. If the FMC management interface does not have public internet access, the attack surface is limited.
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Microsoft Patch Tuesday for August 2026 — Snort rules and prominent vulnerabilities
Microsoft's August 2026 Patch Tuesday fixes 421 vulnerabilities across its products, including 62 rated critical; Cisco Talos published analysis and matching Snort rules.
Microsoft released its August 2026 monthly security update addressing 421 vulnerabilities across a range of products. Of these, 62 flaws were rated critical by Microsoft. Cisco Talos highlighted the most prominent vulnerabilities in the release and published Snort rules for detection of related exploitation attempts.
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Oracle Patches 800+ Vulnerabilities in September 2026 Security Update
Oracle's September 2026 Critical Patch Update fixes 800+ vulnerabilities, including over 100 critical flaws and 240+ remotely exploitable without authentication.
Oracle released 673 new security patches in its September 2026 Critical Security Patch Update, resolving 672 unique CVEs across 17 risk matrices plus 130+ additional CVEs. More than 100 flaws are critical severity and over 240 are remotely exploitable without authentication. Oracle E-Business Suite received the largest batch with 159 patches, followed by Fusion Middleware (153, including 78 unauthenticated remote flaws) and Hyperion (102). Oracle reports no exploitation of these specific flaws but warns attackers routinely exploit unpatched Oracle products.
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