CVE-2020-3267: Cisco Unified Contact Center Express Improper API Authorization Vulnerability

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-03 · updated 2026-06-17
Weakness: CWE-285

Description

A vulnerability in the API subsystem of Cisco Unified Contact Center Express (Unified CCX) could allow an authenticated, remote attacker to change the availability state of any agent. The vulnerability is due to insufficient authorization enforcement on an affected system. An attacker could exploit this vulnerability by authenticating to an affected system with valid agent credentials and performing a specific API call with crafted input. A successful exploit could allow the attacker to change the availability state of an agent, potentially causing a denial of service condition.

Affected products

Cisco Unified Contact Center Express: before 12.5\(1\) — fixed in 12.5\(1\)

How to fix

Upgrade to a fixed version: Cisco Unified Contact Center Express 12.5\(1\). Check the vendor advisory for mitigations.

References

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