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CVE-2026-81579— An untrusted Pointer Dereference can be exploited to escalate privileges by an unprivileged user on Windows

Quick assessment

Affected
wibu-systems-ag wibukey
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 Windows 版 WibuKey 6.71 版本之前，64 位 Windows 系统下的 WibuKey2_64.sys 内核驱动中存在一个不受信任的指针解引用漏洞。攻击者可利用该漏洞实现“写-何处-写何物”（write-what-where）原语，从而进行本地权限提升。该漏洞可被利用来执行任意代码、运行管理员权限的 Shell，或完全控制系统。

CVSS 8.8 · High
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I. Basic Information for CVE-2026-81579

Vulnerability Information
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Vulnerability Title
An untrusted Pointer Dereference can be exploited to escalate privileges by an unprivileged user on Windows
Source: CVE Program / CVE List V5
Vulnerability Description
In WibuKey for Windows before version 6.71, an untrusted pointer dereference in the WibuKey2_64.sys kernel driver for 64-bit Windows allows an attacker to exploit a write-what-where primitive, enabling local privilege escalation. This can be leveraged to execute arbitrary code, run an administrator shell, or gain full control over the system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
任意地址可写任意内容条件
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wibu-systems-ag wibukey 0 ~ 6.71 -

II. Public POCs for CVE-2026-81579

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III. Intelligence Information for CVE-2026-81579

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Vendor Advisories for CVE-2026-81579 (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-2026-81573 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
CVE-2026-81575 7.5 HIGH Missing Sanity Checks for Buffer Lengths

IV. Related Vulnerabilities

Same product: wibukey
Same vendor: wibu-systems-ag
Same weakness: CWE-123

V. Comments for CVE-2026-81579

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