# CVE-2025-0994: Trimble Cityworks Deserialization

> An authenticated user can achieve remote code execution on the IIS web server via a deserialization flaw in Trimble Cityworks.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Yes, since 7 Feb 2025 (CISA KEV)
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Feb 2025
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-m5q8-8x36-w25p

## What is CVE-2025-0994?

CVE-2025-0994 is a high-severity unsafe deserialization vulnerability in Trimble Cityworks, published on 6 Feb 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Trimble Cityworks versions prior to 15.8.9 and Cityworks with office companion versions prior to 23.10 are vulnerable to a deserialization vulnerability. This could allow an authenticated user to perform a remote code execution attack against a customer’s Microsoft Internet Information Services (IIS) web server.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2025-0994?

It affects 1 product.


Products: Trimble Cityworks.

## How do I fix CVE-2025-0994?

No fix has been published for CVE-2025-0994 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 28 Feb 2025.

## Is CVE-2025-0994 being exploited?

Yes. Attackers have exploited CVE-2025-0994 in the wild since at least 7 Feb 2025.

Public exploit code:

- Cityworks deserialization of untrusted data vulnerability Detection (github_poc): https://github.com/rxerium/CVE-2025-0994

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-0994 and fix it if it is affected.

What it is: CVE-2025-0994 is a high-severity unsafe deserialization vulnerability in Trimble Cityworks, published on 6 Feb 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2025-0994 in the wild since at least 7 Feb 2025.

Affected product: Trimble Cityworks. 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-2025-0994/ (Markdown: https://insights.sbomify.com/CVE-2025-0994/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-0994
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-0994
- OSV: https://osv.dev/vulnerability/CVE-2025-0994

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-0994/
Summaries are generated and may contain mistakes; the official description above is the record.