# CVE-2025-26400: SolarWinds Web Help Desk XML External Entity Injection (XXE) Vulnerability

> An attacker with low-privilege access can exploit an XML External Entity vulnerability in SolarWinds Web Help Desk to disclose sensitive information.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jul 2025
- **Updated:** 29 Jul 2025
- **Also known as:** GHSA-gcmc-57w6-9878

## What is CVE-2025-26400?

CVE-2025-26400 is a medium-severity vulnerability in SolarWinds Web Help Desk, published on 29 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

SolarWinds Web Help Desk was reported to be affected by an XML External Entity Injection (XXE) vulnerability that could lead to information disclosure. A valid, low-privilege access is required unless the attacker had access to the local server to modify configuration files.

Weakness: CWE-611 (Improper Restriction of XML External Entity Reference)

## Which versions are affected by CVE-2025-26400?

It affects 1 product.


Products: Solarwinds Web Help Desk.

## How do I fix CVE-2025-26400?

No fix has been published for CVE-2025-26400 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-26400 being exploited?

There is no known exploitation of CVE-2025-26400 in the wild and no public exploit code.

## Other vulnerabilities in SolarWinds Web Help Desk

- [CVE-2025-40551](https://insights.sbomify.com/CVE-2025-40551/): SolarWinds Web Help Desk Deserialization of Untrusted Data (critical 9.8, exploited in the wild)
- [CVE-2025-26399](https://insights.sbomify.com/CVE-2025-26399/): SolarWinds Web Help Desk Deserialization of Untrusted Data (critical 9.8, exploited in the wild)
- [CVE-2024-28986](https://insights.sbomify.com/CVE-2024-28986/): SolarWinds Web Help Desk Deserialization of Untrusted Data (critical 9.8, exploited in the wild)
- [CVE-2024-28987](https://insights.sbomify.com/CVE-2024-28987/): SolarWinds Web Help Desk Hardcoded Credential (critical 9.1, exploited in the wild)
- [CVE-2025-40536](https://insights.sbomify.com/CVE-2025-40536/): SolarWinds Web Help Desk Security Control Bypass (high 8.1, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-26400 and fix it if it is affected.

What it is: CVE-2025-26400 is a medium-severity vulnerability in SolarWinds Web Help Desk, published on 29 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-26400 in the wild and no public exploit code.

Affected product: SolarWinds Web Help Desk. 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-2025-26400/ (Markdown: https://insights.sbomify.com/CVE-2025-26400/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-26400
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-26400
- OSV: https://osv.dev/vulnerability/CVE-2025-26400

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-26400/
Summaries are generated and may contain mistakes; the official description above is the record.