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Unified Communications Manager CVE-2025-20309

| EUVD-2025-19749 CRITICAL
Use of Hard-coded Credentials (CWE-798)
2025-07-02 psirt@cisco.com
10.0
CVSS 3.1
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CVSS VectorNVD

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

Lifecycle Timeline

4
EUVD ID Assigned
Mar 16, 2026 - 01:55 euvd
EUVD-2025-19749
Analysis Generated
Mar 16, 2026 - 01:55 vuln.today
Patch released
Mar 16, 2026 - 01:55 nvd
Patch available
CVE Published
Jul 02, 2025 - 17:15 nvd
CRITICAL 10.0

DescriptionNVD

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.

Analysis

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.

Technical ContextAI

This vulnerability is classified as Use of Hard-coded Credentials (CWE-798).

RemediationAI

A vendor patch is available. Apply it as soon as possible and verify the fix.

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CVE-2025-20309 vulnerability details – vuln.today

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