# CVE-2026-25710: Privilege escalation in plasma-login-manager

> A compromised service account can exploit a D-Bus helper to change ownership of arbitrary files, leading to privilege escalation.

- **Severity:** High 7.0 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 May 2026
- **Updated:** 13 May 2026
- **Also known as:** GHSA-wv98-2g94-x84x

## What is CVE-2026-25710?

CVE-2026-25710 is a high-severity vulnerability in KDE plasma-login-manager, published on 13 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The new upstream added a privileged D-Bus
helper called plasmaloginauthhelper, which suffers from multiple issues, e.g.aA compromised plasmalogin service account can chown() arbitrary files in the system.

Weakness: CWE-250 (Execution with Unnecessary Privileges)

## Which versions are affected by CVE-2026-25710?


## How do I fix CVE-2026-25710?

No fix has been published for CVE-2026-25710 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25710 being exploited?

There is no known exploitation of CVE-2026-25710 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25710 and fix it if it is affected.

What it is: CVE-2026-25710 is a high-severity vulnerability in KDE plasma-login-manager, published on 13 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-25710 in the wild and no public exploit code.

Affected product: KDE plasma-login-manager. 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-2026-25710/ (Markdown: https://insights.sbomify.com/CVE-2026-25710/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25710
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25710
- OSV: https://osv.dev/vulnerability/CVE-2026-25710

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25710/
Summaries are generated and may contain mistakes; the official description above is the record.