Hackers are already targeting Cisco firewalls - and it's only a matter of time before they find yours, experts warn.

Cisco warned customers today to patch two zero-day vulnerabilities that are actively being exploited in attacks and impact ...

Nearly 50,000 Cisco ASA/FTD instances vulnerable to two bugs that are actively being exploited by "advanced" attackers remain ...

Cisco ASA zero-day attacks used RayInitiator bootkit and LINE VIPER malware to breach end-of-support firewalls.

A critical zero-day vulnerability in certain Cisco Systems firewalls has to be patched immediately, US and UK cyber ...

Cisco published advisories and a supplemental post about three zero-day vulnerabilities, two of which were exploited in the wild by an advanced threat actor associated with the ArcaneDoor ...

Cisco released emergency patches for two firewall vulnerabilities exploited as zero-days in the ArcaneDoor espionage campaign ...

The US’s Cybersecurity and Infrastructure Security Agency has issued an emergency directive, calling the hacking campaign ...

IntroductionOn September 25, 2025, Cisco released a security advisory to patch three security flaws impacting the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) and Cisco ...

In a separate alert, CISA said it's issuing an emergency directive urging federal agencies to identify, analyze, and mitigate potential compromises with immediate effect. In addition, both ...

CISA officials issued the directive on Thursday. The zero-day vulnerabilities in question, CVE-2025-20362 and CVE-2025-20333, ...

An attack campaign has been identified which exploits vulnerabilities in Cisco Adaptive Security Appliance software ...