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TI-2026-56283 Aliases CVE-2026-81576GHSA-gj9j-5pfx-gc7p

Improper Authentication of Session Handles

Priority LOW 34CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0034 27th percentileScored 2026-11-07
Fix Fixed codemeter-runtime (wibu-systems-ag): 9.10, 8.41a

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
wibu-systems-agcodemeter-runtime9.00 to before 9.10; 8.00 to before 8.41a; 7.00; 6.009.10, 8.41aPatch availableCNA
  • codemeter-runtime Vendorwibu-systems-ag Affected 9.00 to before 9.10; 8.00 to before 8.41a; 7.00; 6.00 Fixed in 9.10, 8.41a Patch available CNA

Remediation

  • Fix · CNA codemeter-runtime (wibu-systems-ag) Fixed in 9.10, 8.41a

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    wibu-systems-ag codemeter-runtime — cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/A…

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-56280 Improper Access Control in Local-Only Configuration CommandsPriority MEDIUM 43
    • TI-2026-56281 Format String Vulnerability in LoggerPriority MEDIUM 42
    • TI-2026-56282 Missing Sanity Checks for Buffer LengthsPriority LOW 33
    Show all 4 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-81576
  2. 2026-10-03 Alias added: GHSA-gj9j-5pfx-gc7p

References

Advisory 1

  • TI-2026-56280 Improper Access Control in Local-Only Configuration Commands CVSS 3.1HIGH 8.6
  • TI-2026-56281 Format String Vulnerability in Logger CVSS 3.1HIGH 8.2
  • TI-2026-56286 Memory corruption in wibu-systems-ag wibukey CVSS 3.1HIGH 8.8
  • TI-2026-56285 An untrusted Pointer Dereference can be exploited to escalate privileges by an unprivileged user on Windows CVSS 3.1HIGH 8.8
  • TI-2026-56279 Local Privilege Escalation in CodeMeter Runtime on Windows CVSS 3.1HIGH 7.8
  • TI-2026-56282 Missing Sanity Checks for Buffer Lengths CVSS 3.1HIGH 7.5
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences