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Known exploited vulnerability · CISA KEV

CVE-2025-59230: Microsoft Windows Improper Access Control Vulnerability

Microsoft Windows contains an improper access control vulnerability in Windows Remote Access Connection Manager which could allow an authorized attacker to elevate privileges locally.

CVE-2025-59230

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2025-10-14: attackers are using it right now.

CISA KEV
Listed
Added 2025-10-14 · federal fix-by 2025-11-04
EPSS (30 days)
2.7%
Higher than 86% of CVEs · 2026-11-01
CVSS v3.1
7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What CISA says

Microsoft Windows Improper Access Control Vulnerability

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

NVD description · published 2025-10-14

Improper access control in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

Full record on NVD

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How to check if you are exposed to CVE-2025-59230

  1. Find every Microsoft Windows system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
  2. Compare each version with the fixed versions in the vendor advisory below. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
  3. Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2025-59230.

US federal agencies had to fix this by 2025-11-04. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Affected versions

Versions the National Vulnerability Database lists as vulnerable to CVE-2025-59230. Check the vendor advisory for the exact fixed builds before you sign anything off.

ProductVulnerable versions
Microsoft Windows 10 1507before 10.0.10240.21161
Microsoft Windows 10 1607before 10.0.14393.8519
Microsoft Windows 10 1809before 10.0.17763.7919
Microsoft Windows 10 21h2before 10.0.19044.6456
Microsoft Windows 10 22h2before 10.0.19045.6456
Microsoft Windows 11 22h2before 10.0.22621.6060

NVD lists 10 more affected products; see the full record on NVD.

Timeline

  1. · Published in the National Vulnerability Database
  2. · Added to CISA's Known Exploited Vulnerabilities catalog, the same day it was published
  3. · Fix-by date for US federal agencies, passed 362 days ago

Vendor advisories and fixes

Weakness type

More exploited Microsoft vulnerabilities

CISA lists 390 exploited Microsoft vulnerabilities. The closest matches:

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Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.

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