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Cisco Zero Day Security Patches

BACKGROUND
4 SIGNALSFIRST DETECTED 15 September 2026UPDATED 4 October 2026
Narrative synthesis pending — 4 signals collected.
How the story developed
17 Sept
Other feeds and industry voices
16 Jun
Cisco Releases Security Updates for Actively Exploited SD-WAN Manager Flaw

Cisco has released security updates for a medium-severity security flaw in Catalyst SD-WAN Manager that has come under active exploitation in the wild. The vulnerability, tracked

REPORT · WHAT · The Hacker NewsOPEN STORY
14 May
Cisco warns of new critical SD-WAN flaw exploited in zero-day attacks

Cisco is warning that a critical Catalyst SD-WAN Controller authentication bypass flaw, tracked as CVE-2026-20182, was actively exploited in zero-day attacks that allowed

REPORT · WHAT · BleepingComputerOPEN STORY
12 Aug
Cisco ASA and FTD Flaw Exploited in the Wild Can Trigger Remote DoS

Cisco has warned that a new vulnerability impacting Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software has been exploited

REPORT · WHEN · The Hacker NewsOPEN STORY
14 May
Cisco Catalyst SD-WAN Controller Auth Bypass Actively Exploited to Gain Admin Access

Cisco has released updates to address a maximum-severity authentication bypass flaw in Catalyst SD-WAN Controller that it said has been exploited in limited attacks. The

REPORT · WHO · The Hacker NewsOPEN STORY
1 Oct
Fortinet warns of critical FortiMail flaw exploited in zero-day attacks

Fortinet is warning customers of a critical FortiMail vulnerability, tracked as CVE-2026-104286, that is being actively exploited in zero-day attacks to execute unauthorized code

REPORT · WHAT · BleepingComputerOPEN STORY
27 Sept
CVE-2026-76441: Improper Access Control in Cisco Secure Email Gateway Exposes Restricted Functions

<h1> CVE-2026-76441: Improper Access Control in Cisco Secure Email Gateway Exposes Restricted Functions </h1> <p>Cisco Secure Email Gateway (formerly Email Security Appliance)

REPORT · WHAT · Dev.toOPEN STORY
9 Sept
Cisco confirms CVE-2026-20079 Secure FMC flaw exploited in attacks

Cisco has confirmed that a maximum-severity authentication bypass vulnerability tracked as CVE-2026-20079 in its Secure Firewall Management Center (FMC) software is being actively

REPORT · WHAT · BleepingComputerOPEN STORY
11 Aug
Cisco warns of high-severity ClamAV flaws with public exploits

Cisco warned of two high-severity vulnerabilities affecting the Secure Endpoint Connector that allow threat actors to crash the ClamAV scanning process in denial-of-service (DoS)

REPORT · WHAT · BleepingComputerOPEN STORY
Sources
BleepingComputer×3The Hacker News

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