CVE-2025-15610: Opentext, Inc Rightfax

Critical severity, CVSS 9.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The .NET Remoting framework used by OpenText Fax (RightFax) includes known security vulnerabilities that could be exploited if the service is exposed in environments where the remoting ports are accessible.

Affected products

• Opentext, Inc Rightfax: from 16.6, up to and including 16.6 Update7136; from 20.2, up to and including 20.2 Update5705; from 21.2, up to and including 21.2.1.2707; from 22.2, up to and including 22.2.0.1644; from 23.4, up to and including 26.4.0.1644; from 24.4, up to and including 24.4.0.1644; …

Published 2026-04-15. Last modified 2026-10-07.