A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.
This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root.
Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.
CVE-2026-20131 viene sfruttato?
Inserito nel catalogo CISA KEV il 2026-03-19.
Scadenza di remediation federale: 2026-03-22.
Oltre quella data da 146 giorni.
Usato in campagne ransomware.
EPSS stima la probabilità di sfruttamento nei prossimi 30 giorni al 31%.
Codice di exploit pubblico: nessuno trovato nelle fonti monitorate.
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