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CVE-2026-81574— Format String Vulnerability in Logger

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.

在 CodeMeter Runtime 8.41a 和 9.10 版本之前，日志记录器在特定情况下未对输入字符串进行净化处理，使得攻击者能够注入 printf 风格的格式说明符。这一缺陷可被利用来可靠地导致 CodeMeter 崩溃，并泄露进程内存和栈金丝雀等敏感信息。该攻击可在本地执行，例如通过 设置代理值；也可在远程环境中，结合 CVE-2026-81573（通过设置 General.ProxyServer 后触发该漏洞）实现。

CVSS 8.2 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-81574

Vulnerability Information
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Vulnerability Title
Format String Vulnerability in Logger
Source: CVE Program / CVE List V5
Vulnerability Description
In CodeMeter Runtime before versions 8.41a and 9.10, the logger does not sanitize input strings in certain cases, allowing an attacker to inject printf-style format specifiers. This can be used to reliably crash CodeMeter and disclose sensitive information such as process memory and stack canaries. The attack works locally, for example by using cmu --set-proxy to set the proxy value, and remotely when combined with CVE-2026-81573 by setting General.ProxyServer and then triggering this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部控制的格式字符串
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wibu-systems-ag codemeter-runtime 9.00 ~ 9.10 -

II. Public POCs for CVE-2026-81574

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III. Intelligence Information for CVE-2026-81574

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Vendor Advisories for CVE-2026-81574 (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-2026-81572 7.8 HIGH Local Privilege Escalation in CodeMeter Runtime on Windows
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-134

V. Comments for CVE-2026-81574

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