CVE-2025-20309

Cisco Unified Communications Manager Static SSH Credentials 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.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.13%
Vendor Advisory cisco.com
Affected: Cisco Cisco Unified Communications Manager
Published at:
Updated at:

References

Link Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssh-m4UBdpE7 vendor advisory patch

Frequently Asked Questions

What is the severity of CVE-2025-20309?
CVE-2025-20309 has been scored as a critical severity vulnerability.
How to fix CVE-2025-20309?
To fix CVE-2025-20309, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-20309 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-20309 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-20309?
CVE-2025-20309 affects Cisco Cisco Unified Communications Manager.
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