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CVE-2025-20309: cisco cisco unified communications manager Use of Hard-coded Credentials

CVSS: 10.0v3.1CriticalAnalyzed
Published 02-07-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-20309 is a critical (CVSS 10.0) Use of Hard-coded Credentials vulnerability in cisco cisco unified communications manager. EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
Critical · v3.1 (CVE.org)
EPSS score
1.19%
0%100%
Low · +0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-07-2025
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

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

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.19%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

+0.09 pp

From 1.10% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco2 products
  • cisco unified communications manager15.0.1.13010-1 | 15.0.1.13011-1 | 15.0.1.13012-1 | 15.0.1.13013-1 | 15.0.1.13014-1 | 15.0.1.13015-1 | 15.0.1.13016-1 | 15.0.1.13017-1
  • unified_communications_manager15.0.1.13010-1 | 15.0.1.13011-1 | 15.0.1.13012-1 | 15.0.1.13013-1 | 15.0.1.13014-1 | 15.0.1.13015-1 | 15.0.1.13016-1 | 15.0.1.13017-1

1 vendor · 2 products

References

1 links