CVE-2024-20253

Name: CVE-2024-20253
Creator: NVD / NIST
Published: 2024-01-26T18:15:10.97+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 2.06%

Last modified Jun 17, 2026

CVE-2024-20253 is a critical-severity vulnerability rated 10/10 on the CVSS scale. A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to the improper processing of user-provided data that is being read into memory. EPSS estimates a 2.06% chance of exploitation in the next 30 days.

Description

A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to the improper processing of user-provided data that is being read into memory. An attacker could exploit this vulnerability by sending a crafted message to a listening port of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with the privileges of the web services user. With access to the underlying operating system, the attacker could also establish root access on the affected device.

Metrics

CVSS 3.1

10/10

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

EPSS Probability

2.06%

78.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Unified Communications Manager	< 12.5\(1\)su8
Cisco	Unified Communications Manager	>= 14.0, < 14su3
Cisco	Unified Communications Manager Im And Presence Service	< 12.5\(1\)su8
Cisco	Unified Communications Manager Im And Presence Service	>= 14.0, < 14.0su3
Cisco	Unity Connection	< 12.5\(1\)su8
Cisco	Unity Connection	>= 14.0, < 14su3
Cisco	Unified Contact Center Express	12.5\(1\)
Cisco	Virtualized Voice Browser	12.5\(1\)
Cisco	Virtualized Voice Browser	12.6\(1\)
Cisco	Virtualized Voice Browser	12.6\(2\)

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-rce-bWNzQcUmIssue Tracking, Vendor Advisory
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-rce-bWNzQcUmIssue Tracking, Vendor Advisory

Timeline

Published: Jan 26, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-20253?

How severe is CVE-2024-20253?

CVE-2024-20253 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 2.06% probability of exploitation in the next 30 days.

How do I fix CVE-2024-20253?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-20253?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST