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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.

WIBU-SYSTEMS WibuKey是德国WIBU-SYSTEMS公司的一款软件加密保护产品。 WIBU-SYSTEMS WibuKey 6.71之前版本存在缓冲区错误漏洞，该漏洞源于WibuKey2_64.sys内核驱动程序中不受信任的指针取消引用，可能导致本地权限提升，执行任意代码、运行管理员shell或完全控制系统。

CVSS 8.8 · High EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
wibu-systems-ag wibukey < 6.71 affected
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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
Vulnerability Title
WIBU-SYSTEMS WibuKey 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WIBU-SYSTEMS WibuKey是德国WIBU-SYSTEMS公司的一款软件加密保护产品。 WIBU-SYSTEMS WibuKey 6.71之前版本存在缓冲区错误漏洞，该漏洞源于WibuKey2_64.sys内核驱动程序中不受信任的指针取消引用，可能导致本地权限提升，执行任意代码、运行管理员shell或完全控制系统。
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 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