CVE-2024-20253

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

2.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2024-01-26 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 07:06 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.4% in the next 30 days (EPSS).
• Severity: 9.9 CRITICAL (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2024-01-26 18:15 UTC

Last modified

2026-06-17 07:06 UTC

Exploit probability

2.4% · EPSS, next 30 days

Weakness

CWE-502 · Unsafe deserialization

Record status

Modified

Affected

• Cisco Unified Communications Manager < 12.5\(1\)su8
• Cisco Unified Communications Manager < 14su3
• Cisco Unified Communications Manager Im And Presence Service < 12.5\(1\)su8
• Cisco Unified Communications Manager Im And Presence Service < 14.0su3
• Cisco Unity Connection < 12.5\(1\)su8
• Cisco Unity Connection < 14su3
• Cisco Unified Contact Center Express 12.5\(1\)
• Cisco Virtualized Voice Browser 12.5\(1\)

Attack profile CVSS 3.1 · 9.9

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2024-20253.md and follow it. Check whether this project is affected by CVE-2024-20253. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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