CVE-2026-81576: Wibu-Systems-AG Codemeter-Runtime

High severity, CVSS 7.7. EPSS: 0.3% chance of exploitation in the next 30 days.

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read license information belonging to another handle.

Affected products

• Wibu-Systems-AG Codemeter-Runtime: from 9.00, before 9.10 (fixed in 9.10); from 8.00, before 8.41a (fixed in 8.41a); version 7.00 only; version 6.00 only

Published 2026-08-27. Last modified 2026-09-01.