CVE-2020-3280

CRITICAL

A vulnerability in the Java Remote Management Interface of Cisco Unified Contact Center Express (Unified CCX) could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by sending a malicious serialized Java object to a specific listener on an affected system. A successful exploit could allow the attacker to execute arbitrary code as the root user on an affected device.

Published: May 22, 2020 Modified: Jun 17, 2026

CWE-20 CWE-502

CVSS Metrics

CVSSv3

Attack Vector: NETWORK Attack Complexity: LOW Privileges Required: NONE User Interaction: NONE Scope: UNCHANGED Confidentiality Impact: HIGH Integrity Impact: HIGH Availability Impact: HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products (1)

Vendor	Product	Version
cisco	unified_contact_center_express	* ≥ 12.0 < 12.0\(1\)es03

GitHub Security Advisory GHSA-7qv8-fcr4-9523

A vulnerability in the Java Remote Management Interface of Cisco Unified Contact Center Express ...

References (2)

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uccx-rce-GMSC6RKN Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uccx-rce-GMSC6RKN Vendor Advisory

Risk Scores

CVSS Score 9.8 / 10

EPSS Score 6.94%

Top 6% most likely to be exploited

Threat Score 41.3 / 100

Data Sources

NVD EPSS GitHub