Cisco Secure Firewall Management Center Software Vulnerabilities

Plan PatchCVSS 9cisco-sa-fmc2-multivulns-HXgcqRGSep 16, 2026
Cisco
IT in OT - Cisco networking products are commonly deployed in OT environments
Attack path
Attack VectorNetwork
Auth RequiredNone
ComplexityHigh
User InteractionNone needed
Summary

Multiple vulnerabilities in Cisco Secure Firewall Management Center (FMC) software allow a remote attacker to gain root access and perform session forgery or session impersonation. These vulnerabilities affect all versions of FMC appliances. Cisco has released software updates that address these vulnerabilities. No workarounds are available.

What this means
What could happen
An attacker with network access to your Firewall Management Center could gain full administrator control and forge user sessions, allowing them to reconfigure firewalls, modify security policies, or disable threat protections across your entire network infrastructure.
Who's at risk
This vulnerability affects anyone operating Cisco Secure Firewall Management Center appliances in any size network. Municipal utilities, water authorities, and industrial facilities that rely on these firewalls for network segmentation and security policy enforcement are directly at risk, as compromise of the management center enables attackers to weaken or disable protections on all downstream firewalls.
How it could be exploited
An attacker sends a specially crafted network request to the Firewall Management Center without needing valid credentials. If successful, the attacker gains root-level code execution on the management console, which controls all deployed firewalls and security policies.
Prerequisites
  • Network access to the Firewall Management Center on its management interface
  • No authentication credentials required
remotely exploitableno authentication requiredaffects network infrastructure controlhigh CVSS score (9.0)
Exploitability
Unlikely to be exploited — EPSS score 0.5%
Affected products (1)
ProductAffected VersionsFix Status
Secure Firewall Management Center (FMC) AppliancesAll versionsFix available
Remediation & Mitigation
0/1
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpdate Cisco Secure Firewall Management Center to the latest available firmware version released by Cisco
API: /api/v1/advisories/79576bf4-7b96-46d2-b760-e37c3a983aeb

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