Vulnerability · Published Aug 27, 2026 · Assigned by wibu
CVE-2026-81576Improper Authentication of Session Handles
High 7.7
In plain English
A high-severity authorization bypass via user-controlled key in codemeter-runtime from wibu-systems-ag. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).
Severity (CVSS 3.1)7.7High
Exploit odds (30 days)0.3%top 72.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| wibu-systems-ag | codemeter-runtime | 9.00 – before 9.108.00 – before 8.41a7.006.00 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N