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CRITICAL Vulnerabilities

Cisco Secure FMC CVE-2026-20316 Zero-Day Used for Unauthenticated Logins

Source headline: Cisco Secure FMC Zero-Day Exploited in the Wild

Threat level Critical
Signal strength 85/100
Source confidence 1 source
Published 2 hours ago

Intelligence Summary

Cisco Secure FMC has a zero-day vulnerability being exploited in real-world attacks. The issue, tracked as CVE-2026-20316, allows remote attackers without authentication to access affected devices. Exploitation can enable attackers to log into systems, increasing the risk of follow-on compromise. Organizations running vulnerable FMC deployments are exposed even without needing valid credentials. Immediate assessment, patching where available, and compensating controls are recommended to reduce exposure.

Recommended Action

Prioritize immediate review, validate exposure, and patch or mitigate affected systems.

Topics

#exploitation #zero-day #cisco #cve-2026-20316 #secure-fmc
Original reporting SecurityWeek Cisco Secure FMC Zero-Day Exploited in the Wild
Open original source

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