CVE-2021-34701: Cisco Unified Communications Products Path Traversal Vulnerability

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-04 · updated 2026-06-17
Weakness: CWE-22

Description

A vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), and Cisco Unity Connection could allow an authenticated, remote attacker to access sensitive data on an affected device. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request that contains directory traversal character sequences to an affected system. A successful exploit could allow the attacker to access sensitive files on the affected system.

Affected products

Cisco Unified Communications Manager: before 14su1 — fixed in 14su1
Cisco Unified Communications Manager IM and Presence Service: before 14su1 — fixed in 14su1
Cisco Unity Connection: before 14su1 — fixed in 14su1

How to fix

Upgrade to a fixed version: Cisco Unified Communications Manager 14su1; Cisco Unified Communications Manager IM and Presence Service 14su1; Cisco Unity Connection 14su1. Check the vendor advisory for mitigations.

References

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