Is CVE-2025-20309 actively exploited?

CVE-2025-20309 has no public evidence of in-the-wild exploitation as of 2025-07-03.

What is the CVSS score for CVE-2025-20309?

CVE-2025-20309 has a CVSS score of 10 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

How do I patch CVE-2025-20309?

Patch guidance is available from cisco security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-20309.

Fix CVE-2025-20309 - CRITICAL

Q: Which products are affected by CVE-2025-20309?

16 products: cisco unified communications manager, cisco unified communications manager, cisco unified communications manager, cisco unified communications manager, cisco unified communications manager, and 11 more.

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 Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-798 · Hard-coded Credentials

Metadata

Primary Vendor: CISCO
Published: 7/2/2025
Last Modified: 7/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

cisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_managercisco : unified_communications_manager

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-20309. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2025-20309

View on NIST NVD

CVE-2025-20309 vulnerability