Cisco Secure Firewall Management Center: Zero Day Actively Exploited

THREAT INTELLIGENCE

Peer Review

4.8

Proven Trust

Dark blue circle with two overlapping checkmarks, one green and one light blue.

ISO 27001 text with a globe outline symbol on a black background.

2025 winner badge for Cyber Security Excellence Awards with gold and black design.

CVE-2026-20316

Cisco

July 29, 2026

Executive Summary

Static low privileged credentials in the FMC web interface allow unauthenticated remote login; active exploitation is already confirmed.

Key Details

Affected Platform

Cisco Secure Firewall

Attack Surface

Network accessible, unauthenticated

Recommended Action

Apply vendor patch

Affected Environment

Cisco Secure Firewall Management Center software, all releases, regardless of device configuration; cdFMC, FDM, ASA, FTD, SCC unaffected.

Operational Impact

Unauthorized access to sensitive FMC data; potential privilege escalation could disrupt centralized firewall management operations.

Technical Root Cause

Hardcoded static credentials tied to a low privileged account exist in FMC software, bypassing intended authentication controls.

Recommended Mitigation

Apply Cisco's hotfix immediately; no workarounds exist.
Rotate all credentials, keys, and certificates on affected FMC devices.

Concerned about your exposure?

Our security experts can help you assess affected systems, validate risk and support a safe remediation plan.

Discuss Your Security Exposure Explore Managed Detection and Response

Assess your risk

Identify affected systems

Plan remediation

Practical, vendor-aligned guidance

Get expert support

From our 24/7 security team

Stay ahead of emerging threats

Get the latest threat intelligence and security advisories from Smarttech247.

Full Technical Report

Download the complete analysis, including detailed technical findings and references.

Download Full Report (PDF)

References

Cisco Security Advisory