CVE-2021-1399: Cisco Unified Communications Manager Self Care Portal Authorization Bypass Vulnerability

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-08 · updated 2026-06-17
Weakness: CWE-302

Description

A vulnerability in the Self Care Portal of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an authenticated, remote attacker to modify data on an affected system without proper authorization. The vulnerability is due to insufficient validation of user-supplied data to the Self Care Portal. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected system. A successful exploit could allow the attacker to modify information without proper authorization.

Affected products

Cisco Unified Communications Manager: from 10.5\(2\) before 12.5\(1\)su4 — fixed in 12.5\(1\)su4

How to fix

Upgrade to a fixed version: Cisco Unified Communications Manager 12.5\(1\)su4. Check the vendor advisory for mitigations.

References

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