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CVE-2026-81575— Missing Sanity Checks for Buffer Lengths

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.

当 CodeMeter Runtime 被配置为服务器时，8.41a 及 9.10 之前的版本会接收包含数据长度和数据内容的数据包（opcode 为 0x5e）。由于对“数据长度”字段缺少边界检查，可能导致越界读取，从而引发内存访问错误（segmentation fault），最终导致 CodeMeter Runtime 崩溃。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1213 · Data from Information Repositories
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I. Basic Information for CVE-2026-81575

Vulnerability Information
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Vulnerability Title
Missing Sanity Checks for Buffer Lengths
Source: CVE Program / CVE List V5
Vulnerability Description
If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 accepts requests with opcode 0x5e, which contain the data length and the data itself. Missing bounds checking on the data length value can lead to out of bounds reads, causing a segmentation fault that ultimately crashes the CodeMeter Runtime.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
长度参数不一致性处理不恰当
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-2026-81575

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III. Intelligence Information for CVE-2026-81575

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Vendor Advisories for CVE-2026-81575 (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-2026-81572 7.8 HIGH Local Privilege Escalation in CodeMeter Runtime on Windows
CVE-2026-81576 7.7 HIGH Improper Authentication of Session Handles

IV. Related Vulnerabilities

Same product: codemeter-runtime
Same vendor: wibu-systems-ag
Same weakness: CWE-130

V. Comments for CVE-2026-81575

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