CVE-2025-20309 — CRITICAL (10.0)

Vulnerability Description

A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to log in to an affected device using the root account, which has default, static credentials that cannot be changed or deleted. This vulnerability is due to the presence of static user credentials for the root account that are reserved for use during development. 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 execute arbitrary commands as the root user.

CVSS Score

10.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Cisco	Unified Communications Manager	15.0.1.13010-1

Related Weaknesses (CWE)

CWE-798

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ciPatchVendor Advisory

FAQ

What is CVE-2025-20309?

CVE-2025-20309 is a vulnerability with a CVSS score of 10.0 (CRITICAL). A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacke...

How severe is CVE-2025-20309?

CVE-2025-20309 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2025-20309?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Unified Communications Manager.