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CVE-2026-20316 is a use of hard-coded password vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software. The flaw is caused by the presence of static credentials for a built-in low-privileged account. An unauthenticated remote attacker can exploit the issue by authenticating to an affected FMC instance with those credentials and obtaining access to data and functionality available to that account. Cisco assessed the issue as high severity because the initial low-privileged access may be chained with other FMC vulnerabilities to achieve further privilege escalation.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
30 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.