CVE-2025-20139: cisco cisco enterprise chat and email Incorrect Regular Expression

Vulnerability summary

CVE-2025-20139 is a high (CVSS 7.5) Incorrect Regular Expression vulnerability in cisco cisco enterprise chat and email. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.3% of scored vulnerabilities.

Timeline

1. 02-04-2025
   PublishedVulnerability first disclosed.
2. 02-04-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability in chat messaging features of Cisco Enterprise Chat and Email (ECE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input to chat entry points. An attacker could exploit this vulnerability by sending malicious requests to a messaging chat entry point in the affected application. A successful exploit could allow the attacker to cause the application to stop responding, resulting in a DoS condition. The application may not recover on its own and may need an administrator to manually restart services to recover.

• CWE-185Incorrect Regular ExpressionThe product specifies a regular expression in a way that causes data to be improperly matched or compared.