CVE-2025-20309

CVE Enrichment

CVSS: 10.0 CRITICAL
EPSS: 1.19%
EPSS Percentile: 66.99%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 03-Jul-2025 00:15
Last Modified: 17-Jun-2026 15:41
EPSS Date: 2026-10-12
CWE: CWE-798

CVSS Vector


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

Affected Products / Versions

cisco / unified_communications_manager
Version / affected range: 15.0.1.13010-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13010-1:*:*:*:-:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13010-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13010-1:*:*:*:session_management:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13011-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13011-1:*:*:*:-:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13011-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13011-1:*:*:*:session_management:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13012-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13012-1:*:*:*:-:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13012-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13012-1:*:*:*:session_management:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13013-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13013-1:*:*:*:-:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13013-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13013-1:*:*:*:session_management:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13014-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13014-1:*:*:*:-:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13014-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13014-1:*:*:*:session_management:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13015-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13015-1:*:*:*:-:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13015-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13015-1:*:*:*:session_management:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13016-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13016-1:*:*:*:-:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13016-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13016-1:*:*:*:session_management:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13017-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13017-1:*:*:*:-:*:*:*
cisco / unified_communications_manager
Version / affected range: 15.0.1.13017-1
cpe:2.3:a:cisco:unified_communications_manager:15.0.1.13017-1:*:*:*:session_management:*:*:*

References

[email protected]

Last enrichment sync: 24-Oct-2026 17:28
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

Cisco has released urgent security updates to fix a critical vulnerability (CVE-2025-20309, CVSS 10.0) in Unified Communications Manager (Unified CM) and its Session Management Edition. This flaw allows attackers to Cisco Patches CVSS 10.0 Unified Communications Manager Flaw That Could Grant Root Access

CVE (2)

Threat Actors (4)

MITRE ATT&CK (1)

Vendors (1)

Products (4)

Tools (2)

Industries (3)

Countries (13)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.