Cisco: >> Secure Firewall Management Center >> 7.6.1 Security Vulnerabilities
CVE-2026-20131
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.
Known exploited
CVSS Score
10.0
EPSS Score
0.011
Published
2026-03-04
A vulnerability in the administrative web-based GUI configuration manager of Cisco Firepower Management Center Software could allow an authenticated, remote attacker to access sensitive configuration information. The attacker would require low privilege credentials on an affected device.
This vulnerability is due to lack of proper encryption of sensitive information stored within the GUI configuration manager. An attacker could exploit this vulnerability by logging into the FMC GUI and navigating to certain sensitive configurations. A successful exploit could allow the attacker to view sensitive configuration parameters in clear text.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.[[Publication_URL{Layout()}]]This advisory is part of the October 2021 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see .
CVSS Score
4.3
EPSS Score
0.002
Published
2024-11-15