CVE-2026-20316

MEDIUM

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.

CVSS v3.1 Score

5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Published: 7/29/2026Modified: 8/1/2026

Related Intelligence (4)

CRITICALZero Day

Cisco Secure FMC Zero-Day Exploited in the Wild

The vulnerability tracked as CVE-2026-20316 can be exploited by a remote, unauthenticated attacker to log into affected devices. The post Cisco Secure FMC Zero-Day Exploited in the Wild appeared first on SecurityWeek .

CVE-2026-20316
SecurityWeek
CRITICALZero Day

Cisco FMC Zero-Day Actively Exploited, Static Credentials Could Expose Sensitive Data

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added a newly disclosed security flaw impacting Cisco Secure Firewall Management Center (FMC) Software to its Known Exploited Vulnerabilities (KEV) catalog, following reports of zero-day exploitation. The vulnerability, assigned CVE-2026-20316 (CVSS score: 5.3), could permit an unauthenticated, remote attacker to log

CVE-2026-20316
The Hacker News
CRITICALZero Day

Cisco warns of FMC static credential flaw exploited in zero-day attacks

Cisco is warning that a high-severity Secure Firewall Management Center (FMC) static credential vulnerability, tracked as CVE-2026-20316, was actively exploited in zero-day attacks to gain unauthorized access to vulnerable devices. [...]

CVE-2026-20316
BleepingComputer
HIGHVulnerability

CISA KEV: Cisco Secure Firewall Management Center (FMC) — Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability

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.

CVE-2026-20316Cisco Secure Firewall Management Center (FMC)
CISA KEV

References (2)

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3CjhVendor Advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20316US Government Resource