CVE-2020-3163: Cisco Unified Contact Center Enterprise Denial of Service Vulnerability

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-02-19 · updated 2026-06-17
Weakness: CWE-362

Description

A vulnerability in the Live Data server of Cisco Unified Contact Center Enterprise could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability exists because the affected software improperly manages resources when processing inbound Live Data traffic. An attacker could exploit this vulnerability by sending multiple crafted Live Data packets to an affected device. A successful exploit could cause the affected device to run out of buffer resources, which could result in a stack overflow and cause the affected device to reload, resulting in a DoS condition. Note: The Live Data port in Cisco Unified Contact Center Enterprise devices allows only a single TCP connection. To exploit this vulnerability, an attacker would have to send crafted packets to an affected device before a legitimate Live Data client establishes a connection.

Affected products

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

How to fix

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

References

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