Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability
Cisco Secure Firewall Management Center software and Cisco Security Cloud Control Firewall Management are affected regardless of device configuration. Cisco has released software updates that address the flaw.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Cisco Secure Firewall Management Center (FMC) Software is affected through its web-based management interface. An unauthenticated remote attacker could exploit this flaw to run arbitrary code with root privileges on the device.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Cisco Cisco Secure Firewall Management Center (FMC)
7.0.0, 7.0.0.1, 7.0.1, 7.1.0, 6.4.0.13, 7.0.1.1, 6.4.0.14, 7.1.0.1, 7.0.2, 6.4.0.15, 7.2.0, 7.0.2.1, 7.0.3, 7.1.0.2, 7.2.0.1, 7.0.4, 7.2.1, 7.0.5, 6.4.0.16, 7.3.0, 7.2.2, 7.3.1, 7.2.3, 7.1.0.3, 7.2.3.1, 7.2.4, 7.0.6, 7.2.4.1, 7.2.5, 7.3.1.1, and 40 more
References 1
sec.cloudapps.cisco.com
Questions about CVE-2026-20131
What does this mean?
A flaw in Cisco Secure Firewall Management Center software could allow an attacker to execute arbitrary code on the device. The attacker could also elevate privileges to root.Source: sec.cloudapps.cisco.com
Am I affected, and how do I check?
Cisco Secure FMC Software and Cisco Security Cloud Control (SCC) Firewall Management are affected, regardless of device configuration. The checked facts do not list specific affected version numbers, so compare the software version on the device against the version list in Cisco's advisory.Source: sec.cloudapps.cisco.com
What should I do about it?
Install the software update Cisco has released to address this vulnerability. The checked facts do not name the fixed release, so use the version given in Cisco's advisory.Source: sec.cloudapps.cisco.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-03-19, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
No workarounds are available for this vulnerability. Cisco has released software updates, so installing a fixed release is the remedy.Source: sec.cloudapps.cisco.com