CISA KEV · Known exploitedMedium

CVE-2026-20316

Cisco Cisco Secure Firewall Management Center (FMC), secure firewall management center

A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems. This vulnerability is due to the presence of static user credentials for a low-privileged account. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to log in to the affected system and access sensitive data as the low-privileged user.&n...

CVSS: 5.3
EPSS: 0.79%
CISA KEV: Listed
Published: 2026.07.30

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability0.79%

Technical severityCVSS 5.3

Vulnerability overview

Affected product and versions

Product: Cisco Cisco Secure Firewall Management Center (FMC), secure firewall management center
Affected versions: >= 7.0.0, >= 7.0.0.1, >= 7.0.1, >= 7.0.1.1, >= 7.0.2, >= 7.2.0, >= 7.0.2.1, >= 7.0.3, >= 7.2.0.1, >= 7.0.4, >= 7.2.1, >= 7.0.5, >= 7.3.0, >= 7.2.2, >= 7.3.1, >= 7.2.3, >= 7.2.3.1, >= 7.2.4, >= 7.0.6, >= 7.2.4.1
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Due date: 2026.08.01

1
Identify
Confirm that Cisco Cisco Secure Firewall Management Center (FMC), secure firewall management center and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE: CWE-259
KEV added: 2026.07.29
Ransomware use: 미확인