CVE-2026-81576

Improper Authentication of Session Handles

Published Aug 27, 2026 CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wibusys
Wibusys codemeter Runtime Kit
Vendors & Products Wibusys
Wibusys codemeter Runtime Kit
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Improper Authentication of Session Handles
First Time appeared Wibu-systems-ag
Wibu-systems-ag codemeter-runtime
Weaknesses CWE-639
CPEs cpe:2.3:a:wibu-systems-ag:codemeter-runtime:*:*:*:*:*:*:*:*
cpe:2.3:a:wibu-systems-ag:codemeter-runtime:6.00:*:*:*:*:*:*:*
cpe:2.3:a:wibu-systems-ag:codemeter-runtime:7.00:*:*:*:*:*:*:*
Vendors & Products Wibu-systems-ag
Wibu-systems-ag codemeter-runtime
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
wibu
Published
Updated
Aug 27, 2026, 1:13 PM
Reserved
Aug 27, 2026, 7:01 AM
Status
Awaiting Analysis
Published
Aug 27, 2026, 10:16 AM
Modified
Sep 1, 2026, 8:56 PM