CVEs / CVE-2026-20316
CVE-2026-20316: Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability
- Known exploited in the CISA KEV catalog since 29 Jul 2026
- medium 5.3 CVSS 3.1 (from the CNA)
- EPSS 35% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Cisco Secure Firewall Management Center (FMC) formerly known as Firepower Management Center contains a use of hard-coded password vulnerability that 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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.0 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.0.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.1.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.2 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.0 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.2.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.3 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.0.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.4 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.5 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.3.0 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.2 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.3.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.3 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.3.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.4 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.6 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.4.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.5 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.3.1.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.4.0 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.6.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.5.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.4.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.6 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.4.1.1 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.0.6.2 | — |
| Cisco Cisco Secure Firewall Management Center (FMC) | 7.2.7 | — |
Exploitation
| In CISA KEV since | 29 Jul 2026 |
|---|---|
| Due date for US federal agencies | 1 Aug 2026 |
| Used in ransomware campaigns | Known |
| 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. |
Severity
| CVSS 3.1 | 5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-259 |
References
- CVE-2026-20316 on NVD
- CVE-2026-20316 in the CISA KEV catalog
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20316 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.