Critical

Cisco FMC static credentials exploited by attackers (CVE-2026-20316)

Help Net Security

July 30, 2026 at 10:44 AM

Actively Exploited

Overview

Cisco's Secure Firewall Management Center (FMC) is facing a significant security issue due to a vulnerability identified as CVE-2026-20316. This flaw allows attackers to exploit static credentials associated with a low-privileged user account within the FMC's web interface. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning, indicating that this vulnerability is being actively exploited by malicious actors. Organizations using Cisco FMC should take immediate action to secure their systems, as the exploitation of these credentials could lead to unauthorized access and potential control over network security settings. The report of this vulnerability was made by Jimi Sebree from Horizon3.ai, highlighting the urgency for affected users to address this issue promptly.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Cisco Secure Firewall Management Center (FMC), CVE-2026-20316
Action Required: Organizations are advised to change any static credentials associated with low-privileged accounts and to monitor their systems for unusual activity.
Timeline: Newly disclosed

Original Article Summary

A static credentials vulnerability (CVE-2026-20316) in Cisco Secure Firewall Management Center (FMC), a platform for centrally managing multiple Cisco Secure Firewall devices across a network, is being leveraged by attackers, CISA warned. Two FMC flaws, one indicator of compromise CVE-2026-20316, reported by Jimi Sebree of Horizon3.ai, is found in the FMC software’s web interface. The static user credentials are for a low-privileged account, and they can be used by attackers to log in to an … More → The post Cisco FMC static credentials exploited by attackers (CVE-2026-20316) appeared first on Help Net Security.

Impact

Cisco Secure Firewall Management Center (FMC), CVE-2026-20316

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Organizations are advised to change any static credentials associated with low-privileged accounts and to monitor their systems for unusual activity. Additionally, applying any available patches or updates from Cisco for the FMC software is recommended.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Cisco, Exploit, and 1 more.

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