CVE-2026-20316
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. Limited direct impact.
- In the wild
- CISA lists this as exploited in real attacks. Treat as urgent.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- ReservedThe CVE id was reserved by its CNA
- 2026-07-29 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
- PublishedDisclosed publicly on CVE.org and NVD
- 2026-08-01 Remediation deadlineCISA's due date for federal agencies to fix it
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
- Exploit odds: 35.1% in the next 30 days (EPSS).
- Severity: 5.3 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Added to CISA KEV
- 2026-07-29
- Exploit probability
- 35.1% · EPSS, next 30 days
- Weakness
- CWE-259
- Record status
- Analyzed
Affected
- Cisco Secure Firewall Management Center ≤ 7.0.9
- Cisco Secure Firewall Management Center ≤ 7.2.11
- Cisco Secure Firewall Management Center ≤ 7.3.1.2
- Cisco Secure Firewall Management Center ≤ 7.4.7
- Cisco Secure Firewall Management Center ≤ 7.6.5
- Cisco Secure Firewall Management Center ≤ 7.7.12
- Cisco Secure Firewall Management Center ≤ 10.0.1
Attack profile CVSS 3.1 · 5.3
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-20316.md and follow it. Check whether this project is affected by CVE-2026-20316. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
