CVE-2025-0994: Trimble Cityworks exploited

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

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.

Description quoted from the CVE record (assigned by icscert, published 2025-02-06).

Weakness: CWE-502 Deserialization of Untrusted Data

How it can be exploited

Exploitable over the network with low attack complexity with no special attack requirements needing high privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. 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

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.

On CISA KEV since: 2025-02-07
US federal deadline: 2025-02-28
Ransomware use: Not known

Public exploit evidence (Exploit Observer)

Also known as: BDU:2025-02720, CNNVD-202502-521, EUVD-2025-1955, GHSA-m5q8-8x36-w25p

VEDAS cluster: VEDAS:FLICKERSPIDER

Exploit Observer links 5 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (5)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/nuclei/2025/CVE-2025-0994.yaml
Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/nuclei/2025/CVE-2025-0994.yaml
Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2025/CVE-2025-0994.rules
Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2025/CVE-2025-0994.rules
Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2025/CVE-2025-0994.rules

Research and write-ups (1)

Research or write-up: https://recordedfuture.com/blog/trimble-cityworks-cve-2025-0994-vulnerability-analysis

Vulnerability databases and vendor advisories (7)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://access.redhat.com/security/cve/cve-2025-0994
Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-1955
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-m5q8-8x36-w25p
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-0994
Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-0994
Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202502-521
Vulnerability database or vendor advisory: https://www.tenable.com/cve/CVE-2025-0994

133 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.313
likely to be attacked soon
VEDAS: 0.982
strong exploit evidence
On CISA KEV: Yes, since 2025-02-07
Detection rule: Nuclei · Suricata

EPSS (chance of attack)

VEDAS (exploit evidence)

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish.

Who is affected

Product	Affected	Not affected
Trimble Cityworks	before 15.8.9	Not stated
Trimble Cityworks (with office companion)	before 23.10	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: trimble cityworks, trimble_inc. cityworks, trimble_inc. cityworks_with_office_companion.

How to fix it

Fixed versions stated in the CVE record: 15.8.9, 23.10.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vendor guidance:

https://learn.assetlifecycle.trimble.com/i/1532182-cityworks-customer-communication-2025-02-05-docx/0? (vendor-advisory)

How to detect it

Nuclei template (active check)

Trimble Cityworks - Remote Code Execution
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.

Name and description quoted from the template, written by VEDAS.

The template sends 2 requests (GET /, GET /Cityworks/Login.aspx); it decides using dsl, regex, status, word matchers. Severity in the template: critical. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash

nuclei -u https://your-host -t CVE-2025-0994.yaml

Show the template (51 lines)

yaml

id: CVE-2025-0994

info:
  name: "Trimble Cityworks - Remote Code Execution"
  author: vedas-arpsyndicate
  severity: critical
  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.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2025-0994&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=cityworks&match=exact
  classification:
    cve-id: CVE-2025-0994
  metadata:
    verified: false
  tags: cve,cve2025,kev,cityworks,deserialization,rce
http:
  - method: GET
    path:
      - "{{BaseURL}}"
      - "{{BaseURL}}/Cityworks/Login.aspx"

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        part: body
        words:
          - "Cityworks"

      - type: dsl
        dsl:
          - "compare_versions(version, '<15.8.9')"

    extractors:
      - type: regex
        name: version
        part: body
        group: 1
        regex:
          - 'Cityworks ([0-9.]+) - Revision [0-9.]+'
        internal: true

      - type: kval
        kval:
          - version

CVE-2025-0994.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2025-0994 Trimble Cityworks - Remote Code Execution. Add them to your Suricata rule set and reload.

Show the rules

suricata

alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2025-0994 Trimble Cityworks - Remote Code Execution"; flow:established,to_server; http.uri; content:"/Cityworks/Login.aspx"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2025-0994; reference:url,https://www.exploit.observer/?keyword=CVE-2025-0994&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=cityworks&match=exact; sid:1011774; rev:1;)

CVE-2025-0994.rules on GitHub

References

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.