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CVE-2026-81572— Local Privilege Escalation in CodeMeter Runtime on Windows

Quick assessment

Affected
wibu-systems-ag codemeter-runtime
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WIBU-SYSTEMS CodeMeter Runtime是德国WIBU-SYSTEMS公司的一款软件加密与授权管理运行时组件。 WIBU-SYSTEMS CodeMeter Runtime 8.40版本至8.41a之前版本和9.00版本至9.10之前版本存在后置链接漏洞，该漏洞源于目录和文件路径未正确检查NTFS重解析点，可能导致本地攻击者创建指向任意系统路径的junction，利用System权限删除任意文件并实现权限提升。

CVSS 7.8 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 2

VendorProduct Version RangeStatus
wibu-systems-ag codemeter-runtime 8.40< 8.41a affected
9.00< 9.10 affected
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I. Basic Information for CVE-2026-81572

Vulnerability Information
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Vulnerability Title
Local Privilege Escalation in CodeMeter Runtime on Windows
Source: CVE Program / CVE List V5
Vulnerability Description
In CodeMeter Runtime from version 8.40 to (excluding) 8.41a and 9.00 to (excluding) 9.10, cmu.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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
WIBU-SYSTEMS CodeMeter Runtime 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WIBU-SYSTEMS CodeMeter Runtime是德国WIBU-SYSTEMS公司的一款软件加密与授权管理运行时组件。 WIBU-SYSTEMS CodeMeter Runtime 8.40版本至8.41a之前版本和9.00版本至9.10之前版本存在后置链接漏洞，该漏洞源于目录和文件路径未正确检查NTFS重解析点，可能导致本地攻击者创建指向任意系统路径的junction，利用System权限删除任意文件并实现权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wibu-systems-ag codemeter-runtime 8.40 ~ 8.41a -

II. Public POCs for CVE-2026-81572

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III. Intelligence Information for CVE-2026-81572

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Vendor Advisories for CVE-2026-81572 (1)

Security Blog Posts for CVE-2026-81572 (1)

Same Patch Batch · wibu-systems-ag · 2026-08-27 · 7 CVEs total

CVE-2026-81581 8.8 HIGH User input in WibuKey is used (without proper sanitization) to compute the address of a po
CVE-2026-81579 8.8 HIGH An untrusted Pointer Dereference can be exploited to escalate privileges by an unprivilege
CVE-2026-81573 8.6 HIGH Improper Access Control in Local-Only Configuration Commands
CVE-2026-81574 8.2 HIGH Format String Vulnerability in Logger
CVE-2026-81576 7.7 HIGH Improper Authentication of Session Handles
CVE-2026-81575 7.5 HIGH Missing Sanity Checks for Buffer Lengths

IV. Related Vulnerabilities

Same product: codemeter-runtime
Same vendor: wibu-systems-ag
Same weakness: CWE-59