Secuno
ENNL
Book demo

CVE-2025-20309

Cisco Unified Communications Manager hard-coded credentials

10.0 CRITICALEPSS 1.19%
  1. Published2 Jul 2025

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Cisco Unified Communications Manager15.0.1.13010-1 · 15.0.1.13011-1 · 15.0.1.13012-1 · 15.0.1.13013-1

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1095669.8
Rapyd Admin from 9.0.0 before 9.20.0 contains a hard-coded credentials vulnerability…
CVE-2026-1087539.4
Agnaistic agnai through 1.0.555 contains a hard-coded credentials vulnerability in…
CVE-2026-1052789.8
The published Docker image for openPDC includes a fixed administrative credential with…
CVE-2026-842508.4
IBM Guardium Data Protection 12.2 is vulnerable due to weak cryptographic protection…
CVE-2026-622529.8
Homer is open source telecom observability software. Prior to version 11.0.283, on…
CVE-2026-1021618.8
An unauthenticated attacker located on an adjacent private network (or any attacker…

Frequently asked

Is CVE-2025-20309 being actively exploited?

CVE-2025-20309 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.19%.

How severe is CVE-2025-20309?

CVE-2025-20309 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 1.19% probability of exploitation.

Which products are affected by CVE-2025-20309?

Affected products include Cisco Unified Communications Manager.

How do I fix CVE-2025-20309?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-20309 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.