Live › vulnerability › CVE-2026-20316
Go to dashboardEvery self-hosted Cisco Secure FMC build ships a static low-privileged web-interface account, so an unauthenticated remote attacker can log in and read sensitive data. Cisco rates it High (CVSS 5.3 base) because it chains with other FMC bugs, for example CVE-2026-20079 (auth bypass to root), which Talos saw exploited alongside it. Exploited in the wild since July 2026 and in CISA KEV with known ransomware use. Cisco says there is no workaround.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
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.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Cisco Secure Firewall Management Center (FMC) | vendor | – | – |
| Cisco Secure Firewall Management Center (FMC) | vendor | 7.0.0-7.0.9, 7.2.0-7.2.11, 7.3.x, 7.4.0-7.4.7, 7.6.0-7.6.5, 7.7.0-7.7.12, 10.0.0-10.0.1 | 7.0.10, 7.2.12, 7.4.8, 7.6.6, 7.7.13, 10.0.2, 10.1.0 |
| cisco secure firewall management center | vendor | >= 7.0.0, <= 7.0.9 | – |
| cisco secure firewall management center |
| vendor |
| >= 7.2.0, <= 7.2.11 |
| – |
| cisco secure firewall management center | vendor | >= 7.3.0, <= 7.3.1.2 | – |
| cisco secure firewall management center | vendor | >= 7.4.0, <= 7.4.7 | – |
| cisco secure firewall management center | vendor | >= 7.6.0, <= 7.6.5 | – |
| cisco secure firewall management center | vendor | >= 7.7.0, <= 7.7.12 | – |
| cisco secure firewall management center | vendor | >= 10.0.0, <= 10.0.1 | – |
7.0.10 (7.0 and earlier), 7.2.12, 7.4.8, 7.6.6, 7.7.13, 10.0.2, or 10.1.0Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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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.
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