Related Threat Clusters
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Cisco Fixes Critical AsyncOS Vulnerability Under Attack
Cisco has addressed a maximum-severity vulnerability in AsyncOS, tracked as CVE-2025-20393, which has been actively exploited for at least a month. The flaw affects Secure Email Gateway (SEG) and Secure Email and Web…
11 articles · Updated January 15, 2026 -
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 -
Cisco Patches Critical RCE Flaw Exploited by Hackers
Cisco has released a patch for a critical remote code execution vulnerability (CVE-2025-20393) affecting its Secure Email appliances. This flaw was actively exploited by Chinese state-sponsored groups for several weeks…
2 articles · Updated January 18, 2026
Recent Intelligence Reports
- Cisco has finally patched maximum-level security issue targeted by hackers — Msn · January 18, 2026
- Cisco finally fixes AsyncOS zero — Bleepingcomputer · January 16, 2026
- Cisco email security products actively targeted in zero-day campaign — Techradar · December 19, 2025
- Cisco says China — Cybersecuritydive · December 18, 2025
- Cisco Vulnerability Exploit: Chinese Hackers Target Email Gateways — Technadu · December 18, 2025
- Attacks pummeling Cisco AsyncOS 0-day since late November — Theregister · December 17, 2025
- Attacks pummeling Cisco AsyncOS 0 — Theregister · December 17, 2025
- Cisco warns of unpatched AsyncOS zero — Bleepingcomputer · December 17, 2025