CVE-2022-20752: Cisco Unified Communications Products Timing Attack Vulnerability

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-07-06 · updated 2026-06-17
Weakness: CWE-208

Description

A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection could allow an unauthenticated, remote attacker to perform a timing attack. This vulnerability is due to insufficient protection of a system password. An attacker could exploit this vulnerability by observing the time it takes the system to respond to various queries. A successful exploit could allow the attacker to determine a sensitive system password.

Affected products

Cisco Unified Communications Manager: from 12.5\(1\) before 12.5\(1\)su6; from 14.0 before 14su1 — fixed in 12.5\(1\)su6, 14su1
Cisco Unity Connection: from 12.5\(1\) before 12.5\(1\)su6; from 14.0 before 14su1 — fixed in 12.5\(1\)su6, 14su1

How to fix

Upgrade to a fixed version: Cisco Unified Communications Manager 12.5\(1\)su6, 14su1; Cisco Unity Connection 12.5\(1\)su6, 14su1. Check the vendor advisory for mitigations.

References

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