Product Security Advisory: WIBU-103081
Sharing rules
TLP:CLEAR
For the TLP version see: https://www.first.org/tlp/
Vulnerability Title
Local Privilege Escalation in CodeMeter Runtime on Windows
Affected Products
| Affected Products | Fixed Products |
|---|---|
| CodeMeter Runtime 8.x versions 8.40 - 8.41 CodeMeter Runtime 9.x versions < 9.10 | CodeMeter Runtime 8.x versions >= 8.41a CodeMeter Runtime 9.x versions >= 9.10 |
Vulnerability Details
| Highest CVSSv3.1 Base Score | 7.8 |
| CVSSv3.1 Vector(s) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Highest Severity | High |
Vulnerabilities
Local Privilege Escalation in CodeMeter Runtime on Windows (CVE-2026-81572)
Descriptioncmu.exe --create-io --file C: creates a predictable temporary file under C:\CM-Stick. The directory and file paths are not properly checked for NTFS reparse points, such as junctions or symbolic links, before file operations are performed. A local attacker can create a junction at the temporary file that points to an arbitrary system path. Because CodeMeter Runtime runs with System privileges, this could allow arbitrary files to be deleted with System privileges and potentially enable local privilege escalation.
| CWE: | CWE-59:Improper Link Resolution Before File Access ('Link Following') |
Product status
Known affected
| Product | CVSS-Vector | CVSS Base Score |
| CodeMeter Runtime 8.x versions 8.40 - 8.41 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | 7.8 |
| CodeMeter Runtime 9.x versions < 9.10 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | 7.8 |
Fixed
- CodeMeter Runtime 8.x versions >= 8.41a
- CodeMeter Runtime 9.x versions >= 9.10
Acknowledgments
- Andreas Vikerup of Shelltrail AB
WIBU-SYSTEMS AG
WIBU-SYSTEMS CERT
Zimmerstrasse 5
D-76137 Karlsruhe
Namespace: https://wibu.com
References
- Blog post by Shelltrail AB: https://shelltrail.com/research/local-privilege-escalation-to-system-in-wibu-systems-codemeter-application
Publishing Details
| Publisher | WIBU-SYSTEMS AG |
| Webseite | https://www.wibu.com |
| Security Advisories | https://www.wibu.com/support/security-advisories.html |
Document Details
| Document Name | WIBU-103081 |
| Document version | 1.1.1 |
| Initial release date | 2026-07-20T12:00:00.000Z |
| Current release date | 2026-08-27T12:00:00.000Z |
| Language | en-US |
| Status | final |
| Also referred to | |
| Document category | csaf_security_advisory |
Revision history
| Version | Date of the revision | Summary of the revision |
| 1.0.0 | 2026-07-20T12:00:00.000Z | Initial Version |
| 1.1.0 | 2026-08-25T09:00:00.000Z | First public version |
| 1.1.1 | 2026-08-27T12:00:00.000Z | Added CVE-IDs |
Disclaimer
The information in this document is subject to change without notice and should not be construed as a commitment by WIBU-SYSTEMS AG. All information that relates to the future (e.g. planned software versions and release dates) is provided without guarantee.WIBU-SYSTEMS AG provides no warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, for the information contained in this document, and assumes no responsibility for any errors that may appear in this document. In no event shall WIBU-SYSTEMS AG or any of its suppliers be liable for direct, indirect, special, incidental, or consequential damages of any nature or kind arising from the use of this document, or from the use of any hardware or software described in this document, even if WIBU-SYSTEMS AG or its suppliers have been advised of the possibility of such damages.This document and parts hereof must not be reproduced or copied without written permission from WIBU-SYSTEMS AG, and the contents hereof must not be imparted to a third party nor used for any unauthorized purpose.All rights to registrations and trademarks reside with their respective owners.
Sharing rules
TLP:CLEAR
For the TLP version see: https://www.first.org/tlp/