Cisco fixes AsyncOS vulnerability exploited in zero-day attacks (CVE-2025-20393) – Help Net Security
By Zeljka Zorz Publication Date: 2026-01-16 14:54:00 Cisco has finally shipped security updates for its Email Security Gateway and Secure…
Tag: AsyncOS
Cisco finally fixes AsyncOS zero-day exploited since November
By Sergiu Gatlan Publication Date: 2026-01-16 09:20:00 Cisco has finally patched a maximum-severity Cisco AsyncOS zero-day exploited in attacks against…
Cisco AsyncOS 0-Day Vulnerability Exploited in the Wild to run System-level Commands
By Guru Baran Publication Date: 2025-12-18 03:08:00 An active campaign exploiting a zero-day vulnerability in Cisco AsyncOS Software, targeting Secure…
Cisco Warns of Active Attacks Exploiting Unpatched 0-Day in AsyncOS Email Security Appliances
By The Hacker News Publication Date: 2025-12-18 04:10:00 Dec 18, 2025Ravie LakshmananVulnerability / Network Security Cisco has alerted users to…
CVE-2025-20393 Exploitation: A Maximum-Severity Zero-Day Vulnerability in Cisco AsyncOS Software Abused in Attacks by the China-Backed APT UAT-9686 | SOC Prime
By Veronika Telychko Publication Date: 2025-12-18 17:11:00 As 2025 draws to a close, yet another critical Cisco zero-day has emerged,…
CVE-2025-20393: Cisco AsyncOS Zero-Day Impacts Secure Email Appliances
By SOCRadar® Cyber Intelligence Inc. Publication Date: 2025-12-18 10:25:00 CVE-2025-20393 (CVSS 10.0) is a zero-day vulnerability in Cisco AsyncOS Software,…
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Cisco AsyncOS Zero-Day Actively Exploited to Execute System-Level Commands
By AnuPriya Publication Date: 2025-12-18 07:02:00 Cisco Talos has discovered an ongoing campaign exploiting a critical zero-day vulnerability in Cisco…
Cisco warns of unpatched AsyncOS zero-day exploited in attacks
By Sergiu Gatlan Publication Date: 2025-12-17 18:45:00 Cisco warned customers today of an unpatched, maximum-severity Cisco AsyncOS zero-day actively exploited…