CVE-2025-20309

CRITICAL EPSS 60.3%
Published Jul 2, 202512mo ago · Modified Jun 17, 20262w ago
10.0 CVSS 3.1
Critical
Find Similar
Published Jul 2, 2025 12mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
10.0
Exploitability
3.9
Impact
6.0
Vector string
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

Threat Intelligence

EPSS Exploit Probability
60.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-798 Use of Hard-coded Credentials Authentication

Affected Products 16

VendorProductVersionRange
ciscounified_communications_manager15.0.1.13010-1any
ciscounified_communications_manager15.0.1.13010-1any
ciscounified_communications_manager15.0.1.13011-1any
ciscounified_communications_manager15.0.1.13011-1any
ciscounified_communications_manager15.0.1.13012-1any
ciscounified_communications_manager15.0.1.13012-1any
ciscounified_communications_manager15.0.1.13013-1any
ciscounified_communications_manager15.0.1.13013-1any
ciscounified_communications_manager15.0.1.13014-1any
ciscounified_communications_manager15.0.1.13014-1any
ciscounified_communications_manager15.0.1.13015-1any
ciscounified_communications_manager15.0.1.13015-1any
ciscounified_communications_manager15.0.1.13016-1any
ciscounified_communications_manager15.0.1.13016-1any
ciscounified_communications_manager15.0.1.13017-1any
ciscounified_communications_manager15.0.1.13017-1any

References 1

  • sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssh-m4UBdpE7
    PatchVendor Advisory

Remediation

  • sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-ssh-m4UBdpE7
    PatchVendor Advisory