CVE-2026-20316 — Cisco Secure Firewall Management Center (FMC)
CISA KEVAs of 2026-07-30, CVE-2026-20316 is a MEDIUM-severity vulnerability in Cisco Secure Firewall Management Center (FMC), CVSS v3.1 5.3. It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-07-29), with a US federal remediation deadline of 2026-08-01. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-20316, most recently “CVE-2026-20316: Cisco Secure Firewall Management Center Hard-coded Password Vulnerability Added to CISA KEV”.
Last updated: 2026-07-30
What is CVE-2026-20316?
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.
The record classifies CVE-2026-20316 under weakness class CWE-259. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 48 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 5.3 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CISA KEV
- Listed since 2026-07-29, federal remediation deadline 2026-08-01
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2026-07-29, last modified 2026-07-30
Is CVE-2026-20316 being exploited?
CISA added CVE-2026-20316 to the Known Exploited Vulnerabilities catalog on 2026-07-29, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-08-01 under BOD 22-01. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.
Affected products and versions
- Cisco: Secure Firewall Management Center (FMC)
How to fix CVE-2026-20316
Vendor advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh. Because CVE-2026-20316 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-08-01. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-20316
1 tracked threat in the Threadlinqs corpus references CVE-2026-20316, either in the campaign’s CVE list or as an indicator on the campaign record.
- CVE-2026-20316: Cisco Secure Firewall Management Center Hard-coded Password Vulnerability Added to CISA KEV — CRITICAL · 2026-07-29
Sources
Enriched from CVE.org, NVD, CISA KEV, GitHub Security Advisories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.
Other references
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