Improper Authentication of Session Handles

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-81576
StatePUBLISHED
Assignerwibu
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-27 10:16:40 UTC
Updated2026-08-27 10:16:40 UTC
DescriptionIf 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.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from 2fc02b1f-71e7-4514-a878-169626f68903

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Problem Types: CWE-639 | CWE-639 CWE-639 Authorization bypass through User-Controlled key

VersionSourceTypeScoreSeverityVector
3.12fc02b1f-71e7-4514-a878-169626f68903Secondary7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1CNACVSS7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wibu-systems-ag Codemeter-runtime affected 9.00 9.10 custom Not specified
CNA Wibu-systems-ag Codemeter-runtime affected 8.00 8.41a custom Not specified
CNA Wibu-systems-ag Codemeter-runtime affected 7.00 Not specified
CNA Wibu-systems-ag Codemeter-runtime affected 6.00 Not specified

References

ReferenceSourceLinkTags
cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103... 2fc02b1f-71e7-4514-a878-169626f68903 cdn.wibu.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Andrew Teylu of Vector Informatik GmbH (en)

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