CVE-2024-20253

Severity: critical (CVSS 10.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-26 · updated 2026-06-17
Weakness: CWE-502

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.

Affected products

Cisco Unified Communications Manager: before 12.5\(1\)su8; from 14.0 before 14su3 — fixed in 12.5\(1\)su8, 14su3
Cisco Unified Communications Manager IM and Presence Service: before 12.5\(1\)su8; from 14.0 before 14.0su3 — fixed in 12.5\(1\)su8, 14.0su3
Cisco Unified Contact Center Express: 12.5(1)
Cisco Unity Connection: before 12.5\(1\)su8; from 14.0 before 14su3 — fixed in 12.5\(1\)su8, 14su3
Cisco Virtualized Voice Browser: 12.5(1), 12.6(1), 12.6(2)

How to fix

Upgrade to a fixed version: Cisco Unified Communications Manager 12.5\(1\)su8, 14su3; Cisco Unified Communications Manager IM and Presence Service 12.5\(1\)su8, 14.0su3; Cisco Unity Connection 12.5\(1\)su8, 14su3. Check the vendor advisory for mitigations.

References

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