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CVE-2025-20276: Cisco Unified Contact Center Express Remote Code Execution Vulnerability

3.8 CVSS

Description

A vulnerability in the web-based management interface of Cisco Unified CCX could allow an authenticated, remote attacker to execute arbitrary code on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. 

This vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability by sending a crafted Java object to an affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system of an affected device as a low-privilege user. A successful exploit could also allow the attacker to undertake further actions to elevate their privileges to root.

Classification

CVE ID: CVE-2025-20276

CVSS Base Severity: LOW

CVSS Base Score: 3.8

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

Problem Types

Deserialization of Untrusted Data

Affected Products

Vendor: Cisco

Product: Cisco Unified Contact Center Express

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.14% (probability of being exploited)

EPSS Percentile: 35.07% (scored less or equal to compared to others)

EPSS Date: 2025-07-03 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-20276
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uccx-multi-UhOTvPGL

Timeline