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Fencer Intel
critical 9.9

CVE-2024-20253 json

A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an unauthenticated, remote attac…

published 2y ago modified 4mo ago also EUVD-2024-17968

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

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.

Patch / fix

  • 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

Is CVE-2024-20253 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

2.40% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H
NVD 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

  • Cisco Cisco Unified Contact Center Enterprise
  • Cisco Cisco Unity Connection
  • Cisco Cisco Unified Communications Manager
  • Cisco Cisco Unified Contact Center Express
  • Cisco Cisco Unified Communications Manager IM and Presence Service
  • Cisco Cisco Virtualized Voice Browser
  • Cisco Cisco Packaged Contact Center Enterprise
  • Cisco Cisco Unified Communications Manager / Cisco Unity Connection

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.