Cisco Secure Email And Web Manager — Cyber Threats, Attacks & Incidents

Related Threat Clusters

• Cisco Email Security Products Targeted in Zero-Day Campaign by China-Linked Actors

  Cisco has confirmed a zero-day vulnerability (CVE-2025-20393) in its Secure Email appliances that is being exploited by actors linked to China. The attackers have deployed the Aquashell backdoor to establish persistence…

  6 articles · Updated December 20, 2025
• Cisco ASA Zero-Day Exploited in State-Espionage Campaign

  Cisco disclosed a state-espionage campaign targeting its Adaptive Security Appliances (ASA), which are used for firewall and VPN functions. Attackers exploited two zero-day vulnerabilities to infiltrate government…

  27 articles · Updated December 18, 2025
• Cisco Confirms Exploitation of AsyncOS Zero-Day by Chinese Hackers

  Cisco has reported an unpatched zero-day vulnerability (CVE-2025-20393) in its AsyncOS software, affecting Secure Email Gateway and Secure Email and Web Manager appliances. The vulnerability is being actively exploited…

  5 articles · Updated December 17, 2025

Recent Intelligence Reports

• 100+ Cisco Secure Email Devices Exposed to Zero‑Day Exploited in the Wild — Cybersecuritynews · December 21, 2025
• Cisco Confirms a Zero-Day Security Flaw. Here's How Users Can Stay Protected — Techloy · December 18, 2025
• CC-4732 — Digital.Nhs.Uk · December 18, 2025
• Cisco Warns of Active Cyberattack Exploiting Critical AsyncOS Vulnerability — Thecyberexpress · December 18, 2025
• Critical Vulnerability in Cisco Products — Csa.Sg · December 18, 2025
• Cisco, SonicWall Disclose New Attacks Exploiting Zero-Day Flaws — Crn · December 17, 2025
• UAT — Blog.Talosintelligence · December 17, 2025

Related Entities