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

> Local attackers can exploit improper access controls in the EaseUS Partition Master kernel driver to escalate privileges.

- **Severity:** High 8.5 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Jun 2026
- **Updated:** 22 Jun 2026
- **Also known as:** GHSA-5497-893c-j3pf

## What is CVE-2026-12781?

CVE-2026-12781 is a high-severity vulnerability in EaseUS Partition Master, published on 21 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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."

Weakness: CWE-284 (Improper Access Control), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-12781?


## How do I fix CVE-2026-12781?

No fix has been published for CVE-2026-12781 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12781 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12781 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12781 and fix it if it is affected.

What it is: CVE-2026-12781 is a high-severity vulnerability in EaseUS Partition Master, published on 21 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12781 exists.

Affected product: EaseUS Partition Master. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-12781/ (Markdown: https://insights.sbomify.com/CVE-2026-12781/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12781
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12781
- OSV: https://osv.dev/vulnerability/CVE-2026-12781

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-12781/
Summaries are generated and may contain mistakes; the official description above is the record.