---
title: "CVE-2025-0994: Trimble Cityworks Deserialization Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-0994/
description: "CVE-2025-0994 (Trimble Cityworks): Exploited in the wild (CISA KEV). Trimble Cityworks versions prior to 15.8.9 and Cityworks with office companion versions…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-02-06
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-0994"
kev: true
cvss: 8.6
epss: 0.31085
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-0994: Trimble Cityworks Deserialization Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Trimble Cityworks. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-02-07, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-02-28 ; treat that as the outer limit, not the target.
- EPSS 31.1% , percentile 98: FIRST’s model estimates a 31.1% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs an account (high (admin)). Exposure depends on who can log in.

## What it is

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.

## Affected products (CVE record)

- Trimble Cityworks: < 15.8.9
- Trimble Cityworks (with office companion): < 23.10

## Severity

- icscert CVSS 4.0: 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`

## Exploitation

- CISA KEV: added 2025-02-07; federal due date 2025-02-28. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 31.09% probability of exploitation activity in the next 30 days; percentile 98.

## Sources

- [learn.assetlifecycle.trimble.com](https://learn.assetlifecycle.trimble.com/i/1532182-cityworks-customer-communication-2025-02-05-docx/0?)
- [CVE.org record CVE-2025-0994](https://www.cve.org/CVERecord?id=CVE-2025-0994)
- [NVD entry CVE-2025-0994](https://nvd.nist.gov/vuln/detail/CVE-2025-0994)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-0994)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/ics-advisories/icsa-25-037-04)

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Source page: https://erroneo.us/security/cve/CVE-2025-0994/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt