CVE-2026-20131
Act now ● On CISA KEV — actively exploited used in ransomware
Actively exploited — on the CISA KEV list.
CVSS base
—
EPSS — probability of exploitation (30 days)
33.4%
98.3th percentile
CISA KEV
Listed
Added 2026-03-19 · patch by 2026-03-22
Weakness / dates
—
Published — · modified —
Timeline
- 2026-03-19 — Added to CISA KEV (actively exploited)
- 2026-03-22 — CISA patch-by deadline
Description
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain a deserialization of untrusted data vulnerability in the web-based management interface that could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.