CVE-2019-15259: Cisco Unified Contact Center Express HTTP Response Splitting Vulnerability

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-10-02 · updated 2026-06-17
Weakness: CWE-113

Description

A vulnerability in Cisco Unified Contact Center Express (UCCX) Software could allow an unauthenticated, remote attacker to conduct an HTTP response splitting attack. The vulnerability is due to insufficient input validation of some parameters that are passed to the web server of the affected system. An attacker could exploit this vulnerability by convincing a user to follow a malicious link or by intercepting a user request on an affected device. A successful exploit could allow the attacker to perform cross-site scripting attacks, web cache poisoning, access sensitive browser-based information, and similar exploits.

Affected products

Cisco Unified Contact Center Express: before 11.6\(2\); 12.0(1) — fixed in 11.6\(2\)

How to fix

Upgrade to a fixed version: Cisco Unified Contact Center Express 11.6\(2\). Check the vendor advisory for mitigations.

References

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