Cisco fixes vulnerability exploited to DoS its firewalls (CVE-2026-20349)

U.S. CISA adds Metabase, Windows, and Cisco Secure Firewall flaws to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Metabase, Windows, and Cisco Secure Firewall flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the following vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog: CVE-2026-20349 is a vulnerability in Cisco Secure Firewall ASA and FTD software that could allow unauthenticated, […] This articl…

Cisco Firewall Alert: Hackers Exploit ASA, FTD Flaw to Force Remote Restarts

Attackers are already exploiting a high-severity flaw that can force vulnerable Cisco ASA and FTD firewalls to restart remotely. CVE-2026-20349 affects Cisco Secure Firewall software and can trigger a denial-of-service condition without requiring authentication. Cisco has released fixed software, so organizations still running vulnerable deployments face immediate exposure. Security teams responsible for these appliances need to confirm whether …

Cisco fixes vulnerability exploited to DoS its firewalls (CVE-2026-20349)

A high-severity vulnerability (CVE-2026-20349) is being leveraged by attackers to temporarily interrupt the operation of Cisco firewalls, the company has confirmed. The flaw has been added to CISA’s Known Exploited Vulnerabilities catalog and needs to be remediated by US civilian federal agencies by August 14, 2026. Details about the attacks are currently under wraps. Cisco only shared that its Product Security Incident Response Team (PSIRT) bec…