Remote Code Execution Vulnerability in Cisco Secure Firewall Management Center Software
CVE-2026-20316

5.3MEDIUM

Key Information:

Vendor: Cisco
Status: Cisco Secure Firewall Management Center (fmc)
Vendor: CVE Published:; 29 July 2026

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What is CVE-2026-20316?

CVE-2026-20316 is a critical vulnerability found in the web interface of Cisco Secure Firewall Management Center (FMC) Software. This software serves to manage and monitor security policies across network devices, playing a crucial role in an organization’s cybersecurity infrastructure. The vulnerability stems from the presence of static user credentials for a low-privileged account, which allows unauthenticated remote attackers to gain access to the system. If exploited, an attacker could leverage these credentials to log into the management interface and potentially access sensitive data. This vulnerability has been assessed with a high security impact rating due to its potential for abuse, particularly since it can be combined with other vulnerabilities to elevate privileges further.

Potential impact of CVE-2026-20316

Unauthorized Data Access: An attacker could gain access to confidential information stored within the impacted systems, leading to data breaches and exposure of sensitive organizational data.
Privilege Escalation: The vulnerability allows for the exploitation of low-privileged accounts, which could be the first step in a more extensive attack, possibly allowing the attacker to gain higher privileges and greater control over the network.
Increased Attack Surface: Although the risk is mitigated if the management interface is not publicly accessible, organizations that have exposed interfaces are at a heightened risk, making them susceptible to various forms of cyberattacks, including those from ransomware groups.

CISA has reported CVE-2026-20316

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2026-20316 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: 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.

Affected Version(s)

Cisco Secure Firewall Management Center (FMC) 7.0.0

Cisco Secure Firewall Management Center (FMC) 7.0.0.1

Cisco Secure Firewall Management Center (FMC) 7.0.1

News Articles

It Security News

CVE-2026-20316

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

2026-07-30 13:07 A static credentials vulnerability (CVE-2026-20316) in Cisco Secure Firewall Management Center (FMC), a platform for centrally managing multiple Cisco Secure Firewall devices...

3 days ago