# CVE-2025-59287: Windows Server 2019 - RCE

> Live exploitation tracking for CVE-2025-59287 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2025-59287

## Key facts

- **Exploitation phase:** Active Exploitation. The vulnerability is actively exploited at scale across the internet, often via automated tools and large attack campaigns.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows Server 2022, Microsoft Windows Server 2025 (Server Core installation), Microsoft Windows Server 2022, 23H2 Edition (Server Core installation), Microsoft Windows Server 2025, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation), Microsoft Windows Server 2012, Microsoft Windows Server 2012 (Server Core installation), Microsoft Windows Server 2012 R2, Microsoft Windows Server 2012 R2 (Server Core installation)
- **Weaknesses:** CWE-502 (Deserialization of Untrusted Data)
- **Tags:** enterprise_software

## Description

Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

## CrowdSec analysis

[CVE-2025-59287](https://euvd.enisa.europa.eu/vulnerability/CVE-2025-59287) is a critical vulnerability in Windows Server Update Service across multiple Windows Server versions, where deserialization of untrusted data allows unauthorized attackers to execute arbitrary code remotely. This flaw could be exploited over a network, potentially leading to full system compromise, data theft, or disruption of services without requiring user interaction.

CrowdSec has been tracking this vulnerability and its exploits since 17th of December 2025.

CrowdSec network data shows that most actors exploiting CVE-2025-59287 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature.
Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2025-59287 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2025-59287 is currently experiencing high visibility and active exploitation across the internet.

Attackers exploit this vulnerability by sending crafted SOAP/XML requests to WSUS endpoints such as `/ReportingWebService/ReportingWebService.asmx`, `/SimpleAuthWebService/SimpleAuth.asmx`, and `/ClientWebService/Client.asmx`, leveraging insecure deserialization to achieve remote code execution. These exploitation attempts typically involve chained requests to these SOAP services, targeting the deserialization logic in the Windows Server Update Service.

## Timeline

- 2025-10-14: CVE Published. CVE-2025-59287 is published to NVD.
- 2025-10-24: CISA KEV. CVE-2025-59287 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2025-11-14: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).
- 2025-12-17: Rule Released. CrowdSec releases a rule to detect CVE-2025-59287 exploitation attempts against the CrowdSec Network.
- 2025-12-18: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-59287 for the first time.

## References

- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287
- https://hawktrace.com/blog/CVE-2025-59287
- https://www.vicarius.io/vsociety/posts/cve-2025-59287-detection-script-rce-vulnerability-in-windows-server-update-service
- https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951
- https://www.vicarius.io/vsociety/posts/cve-2025-59287-mitigation-script-rce-vulnerability-in-windows-server-update-service
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-59287.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-59287) follows observed exploitation activity for CVE-2025-59287. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.