CVE-2026-81576 (GCVE-0-2026-81576)

Vulnerability from cvelistv5 – Published: 2026-08-27 07:14 – Updated: 2026-08-27 13:13
VLAI
Title
Improper Authentication of Session Handles
Summary
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.
Severity
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 13:10 UTC
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
References
Impacted products
Vendor Product Version CPE status
wibu-systems-ag codemeter-runtime Affected: 9.00 , < 9.10 (custom)
Affected: 8.00 , < 8.41a (custom)
Affected: 7.00
Affected: 6.00
    cpe:2.3:a:wibu-systems-ag:codemeter-runtime:*:*:*:*:*:*:*:*
    cpe:2.3:a:wibu-systems-ag:codemeter-runtime:*:*:*:*:*:*:*:*
    cpe:2.3:a:wibu-systems-ag:codemeter-runtime:7.00:*:*:*:*:*:*:*
    cpe:2.3:a:wibu-systems-ag:codemeter-runtime:6.00:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-25 13:00
Credits
Andrew Teylu of Vector Informatik GmbH
Show details on NVD website
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.