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Critical Remote Code Execution Vulnerability in Cisco Secure Firewall Management Center (CVE-2026-20131)

Zscaler ThreatLabz
Zscaler ThreatLabz
Published March 23, 2026Original Report

Excerpt

IntroductionCisco disclosed a critical remote code execution (RCE) vulnerability, CVE-2026-20131, impacting Cisco Secure Firewall Management Center (FMC) Software. The vulnerability was first disclosed by Cisco on March 4, 2026. The vulnerability carries a CVSS score of 10 and stems from insecure deserialization. The vulnerability allows unauthenticated remote attackers to execute arbitrary Java code on affected devices via the web-based management interface using a…

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Indicators of Compromise

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1 indicators

TypeIndicatorConfidenceScoreFirst Seen
CVECVE-2026-20131HighScore 60/100First seen

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