CVE-2025-59287
Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability - [Actively Exploited]
Description
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
INFO
Published Date :
Oct. 14, 2025, 5:16 p.m.
Last Modified :
Oct. 28, 2025, 12:44 p.m.
Remotely Exploit :
No
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Microsoft Windows Server Update Service (WSUS) contains a deserialization of untrusted data vulnerability that allows for remote code execution.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-59287 ; https://nvd.nist.gov/vuln/detail/CVE-2025-59287
Affected Products
The following products are affected by CVE-2025-59287
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | f38d906d-7342-40ea-92c1-6c4a2c6478c8 | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Apply the latest security updates.
- Restart affected services if required.
- Verify update installation.
Public PoC/Exploit Available at Github
CVE-2025-59287 has a 28 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-59287.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287 | Vendor Advisory |
| https://hawktrace.com/blog/CVE-2025-59287 | Exploit Third Party Advisory |
| https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/ | Press/Media Coverage |
| https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951 | Third Party Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287 | Third Party Advisory US Government Resource |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-59287 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-59287
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Cerberus-CVE Assessment Situation
Python
Exploitation proof-of-concept for CVE-2025-59287 - a critical vulnerability in the Windows Server Update Service (WSUS) caused by the deserialization of untrusted data. This flaw allows an unauthorized attacker to execute arbitrary code over a network, posing a significant security risk.
C# Batchfile Python
Your single pane of glass for threat intel: a clean, public feed that highlights high‑value security updates and trends.
Python JavaScript CSS HTML
WSUS vulnerability PoC
cve-2025-59287 wsus-vulnerability
Python
This is an exploit script written in C# to aid gaining a reverse shell on targets with Windows Server Update Service(WSUS) CVE-2025-59287. We will deliver a reverse shell payload through encrypted SOAP req.
C#
CVE-2025-59287 注入WolfShell内存马
Passive observation and analysis of WS-Man / CIM (SOAP over HTTP/HTTPS) traffic for defensive detection, host-network correlation, and incident triage. No offensive capabilities in mainline; lab-only features must be explicitly gated.
Python Shell PowerShell
Verificacion de vulnerabilidad en WSUS
Python
None
Python
Guía de respuesta rápida y script de auditoría para CVE-2025-59287 (RCE crítica en WSUS).
PowerShell
Need more details on a CVE?
Python
CVE-2025-59287 — Critical unauthenticated RCE in Windows Server Update Services (WSUS) via unsafe deserialization of an AuthorizationCookie, enabling SYSTEM-level compromise and active exploitation; patch or isolate WSUS (ports 8530/8531) immediately.
cve cybersecurity exploit windows windows-update rce
SQL
CVE-2025-59287 is a critical RCE vulnerability in Windows Server Update Services (WSUS) caused by unsafe deserialization of untrusted data. It allows remote attackers to execute arbitrary code without authentication. Urgent patching is advised due to active exploitation.
Helps defenders find their WSUS configurations in the wake of CVE-2025-59287
PowerShell
Module PowerShell de réponse à l'incident CVE-2025-59287 — WSUS Remote Code Execution (RCE)
PowerShell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-59287 vulnerability anywhere in the article.
-
CybersecurityNews
Hackers Actively Scanning for TCP Port 8530/8531 Linked to WSUS Vulnerability CVE-2025-59287
Cybersecurity researchers and firewall monitoring services have detected a dramatic surge in reconnaissance activity targeting Windows Server Update Services (WSUS) infrastructure. Network sensors col ... Read more
-
CybersecurityNews
Apple Patches Multiple Critical Vulnerabilities in iOS 26.1 and iPadOS 26.1
Apple released iOS 26.1 and iPadOS 26.1, addressing multiple vulnerabilities that could lead to privacy breaches, app crashes, and potential data leaks for iPhone and iPad users. The update targets de ... Read more
-
CybersecurityNews
Microsoft Patch for WSUS Vulnerability has Broken Hotpatching on Windows Server 2025
In a recent setback for Windows administrators, Microsoft’s October 2025 security update addressing a critical vulnerability in Windows Server Update Services (WSUS) has inadvertently broken hotpatchi ... Read more
-
BleepingComputer
Microsoft: Patch for WSUS flaw disabled Windows Server hotpatching
An out-of-band (OOB) security update that patches an actively exploited Windows Server Update Service (WSUS) vulnerability has broken hotpatching on some Windows Server 2025 devices. KB5070881, the em ... Read more
-
Help Net Security
Week in review: WSUS vulnerability exploited to drop Skuld infostealer, PoC for BIND 9 DNS flaw published
Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Can your earbuds recognize you? Researchers are working on it Biometric authentication has moved from ... Read more
-
CybersecurityNews
Hackers Exploiting Windows Server Update Services Flaw to Steal Sensitive Data from Organizations
Windows Server Update Services (WSUS) vulnerability is actively exploited in the wild. Criminals are using this vulnerability to steal sensitive data from organizations in various industries. The vuln ... Read more
-
Ars Technica
Two Windows vulnerabilities, one a 0-day, are under active exploitation
Two Windows vulnerabilities—one a zero-day that has been known to attackers since 2017 and the other a critical flaw that Microsoft initially tried and failed to patch recently—are under active exploi ... Read more
-
Help Net Security
Unpatched Windows vulnerability continues to be exploited by APTs (CVE-2025-9491)
A Windows vulnerability (CVE-2025-9491, aka ZDI-CAN-25373) that state-sponsored threat actors and cybercrime groups have been quietly leveraging since at least 2017 continues to be exploited for attac ... Read more
-
hackread.com
Hackers Exploit WSUS Flaw to Spread Skuld Stealer Despite Microsoft Patch
A vulnerability in the Windows Server Update Service (WSUS) is being actively exploited by cybercriminals to plant Skuld Staler malware, according to new research from the cybersecurity firm Darktrac ... Read more
-
Help Net Security
CISA and partners take action as Microsoft Exchange security risks mount
In partnership with international cybersecurity agencies, the US Cybersecurity and Infrastructure Security Agency (CISA) and the National Security Agency (NSA) outlined security best practices for org ... Read more
-
The Hacker News
CISA and NSA Issue Urgent Guidance to Secure WSUS and Microsoft Exchange Servers
Oct 31, 2025Ravie LakshmananVulnerability / Threat Intelligence The U.S. Cybersecurity and Infrastructure Security Agency (CISA) and National Security Agency (NSA), along with international partner ... Read more
-
Help Net Security
Attackers exploiting WSUS vulnerability drop Skuld infostealer (CVE-2025-59287)
Attackers have been spotted exploiting the recently patched WSUS vulnerability (CVE-2025-59287) to deploy infostealer malware on unpatched Windows servers. An out-of-band update Last week’s release of ... Read more
-
security.nl
VS verzoekt organisaties om op kwetsbare Windows-servers te controleren
Het cyberagentschap van de Amerikaanse overheid heeft organisaties opgeroepen om op kwetsbare Windows-servers te controleren. Aanleiding is actief misbruik van een kritieke kwetsbaarheid in de Windows ... Read more
-
CybersecurityNews
CISA Shares New Threat Detections for Actively Exploited WSUS Vulnerability
In a critical update issued on October 29, 2025, the Cybersecurity and Infrastructure Security Agency (CISA) has provided organizations with enhanced guidance on detecting and mitigating threat activi ... Read more
-
The Cyber Express
Apache Warns of Critical Tomcat Vulnerabilities Impacting Versions 9, 10, and 11
The Apache Software Foundation has disclosed two new security vulnerabilities affecting multiple versions of Apache Tomcat, warning system administrators to take immediate action. The flaws, identifie ... Read more
-
The Cyber Express
CISA Warns that DELMIA Apriso Vulnerabilities Are Under Attack
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two DELMIA Apriso vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog. Today’s addition of CVE-2025-6204 and ... Read more
-
The Cyber Express
Critical Flaw CVE-2025-55315 Exposes QNAP NetBak PC Agent to Security Bypass Attacks
A critical vulnerability, tracked as CVE-2025-55315, has been identified in QNAP’s NetBak PC Agent, stemming from a flaw within Microsoft’s ASP.NET Core framework. The issue allows attackers to exploi ... Read more
-
CrowdStrike.com
October 2025 Patch Tuesday: Two Publicly Disclosed, Three Zero-Days, and Eight Critical Vulnerabilities Among 172 CVEs
Microsoft has addressed 172 vulnerabilities in its October 2025 security update release, marking the highest number of vulnerabilities patched in a single month this year. This month's patches address ... Read more
-
The Register
WSUS attacks hit 'multiple' orgs as Google and other infosec sleuths ring Redmond’s alarm bell
More threat intel teams are sounding the alarm about a critical Windows Server Update Services (WSUS) remote code execution vulnerability, tracked as CVE-2025-59287 and now under active exploitation, ... Read more
-
CrowdStrike.com
October 2025 Patch Tuesday: Two Publicly Disclosed, Three Zero-Days, and Eight Critical Vulnerabilities Among 172 CVEs
Microsoft has addressed 172 vulnerabilities in its October 2025 security update release, marking the highest number of vulnerabilities patched in a single month this year. This month's patches address ... Read more
The following table lists the changes that have been made to the
CVE-2025-59287 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Oct. 28, 2025
Action Type Old Value New Value Added Reference Type CVE: https://hawktrace.com/blog/CVE-2025-59287 Types: Exploit, Third Party Advisory Added Reference Type CVE: https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/ Types: Press/Media Coverage -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Oct. 27, 2025
Action Type Old Value New Value Added Reference https://hawktrace.com/blog/CVE-2025-59287 Added Reference https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/ -
Initial Analysis by [email protected]
Oct. 27, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.14393.8524 *cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.7922 *cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.20348.4297 *cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.25398.1916 *cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.26100.6905 Added Reference Type CISA-ADP: https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951 Types: Third Party Advisory Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287 Types: Vendor Advisory Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287 Types: Third Party Advisory, US Government Resource -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Oct. 25, 2025
Action Type Old Value New Value Added Date Added 2025-10-24 Added Due Date 2025-11-14 Added Required Action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Added Vulnerability Name Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 24, 2025
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 20, 2025
Action Type Old Value New Value Added Reference https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951 -
New CVE Received by [email protected]
Oct. 14, 2025
Action Type Old Value New Value Added Description Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-502 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287