4.3 Medium

CVE-2020-27121 A vulnerability in Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software could…

Description

A vulnerability in Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of login requests. An attacker could exploit this vulnerability by sending a crafted client login request to an affected device. A successful exploit could allow the attacker to cause a process to crash, resulting in a DoS condition for new login attempts. Users who are authenticated at the time of the attack would not be affected. There are workarounds that address this vulnerability.

Affected products and versions

Product	Affected versions	Fixed in
Cisco Unified Communications Manager IM and Presence Service	Versions not published

References

20201104 Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerability tools.cisco.com

Timeline

Published November 6, 2020
Last modified November 13, 2024

The 23 CVEs of Cisco Unified Communications Manager IM and Presence Service →

CVE-2026-76481 As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency… 7.5 High CVE-2026-76479 As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency… 7.8 High CVE-2026-76478 As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency… 8.8 High CVE-2026-76476 As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency… 8.8 High

Track this CVE