CVE-2026-21525 (GCVE-0-2026-21525)
Vulnerability from cvelistv5
Published
2026-02-10 17:51
Modified
2026-04-10 13:21
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
CWE
  • CWE-476 - NULL Pointer Dereference
Summary
Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1607 Version: 10.0.14393.0   < 10.0.14393.8868
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   Microsoft Windows 10 Version 1809 Version: 10.0.17763.0   < 10.0.17763.8389
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   Microsoft Windows 10 Version 21H2 Version: 10.0.19044.0   < 10.0.19044.6937
 Create a notification for this product.
   Microsoft Windows 10 Version 22H2 Version: 10.0.19045.0   < 10.0.19045.6937
 Create a notification for this product.
   Microsoft Windows 11 version 22H3 Version: 10.0.22631.0   < 10.0.22631.6649
 Create a notification for this product.
   Microsoft Windows 11 Version 23H2 Version: 10.0.22631.0   < 10.0.22631.6649
 Create a notification for this product.
   Microsoft Windows 11 Version 24H2 Version: 10.0.26100.0   < 10.0.26100.7840
 Create a notification for this product.
   Microsoft Windows 11 Version 25H2 Version: 10.0.26200.0   < 10.0.26200.7840
 Create a notification for this product.
   Microsoft Windows 11 version 26H1 Version: 10.0.28000.0   < 10.0.28000.1575
 Create a notification for this product.
   Microsoft Windows 11 Version 26H1 Version: 10.0.28000.0   < 10.0.28000.1575
 Create a notification for this product.
   Microsoft Windows Server 2012 Version: 6.2.9200.0   < 6.2.9200.25923
 Create a notification for this product.
   Microsoft Windows Server 2012 (Server Core installation) Version: 6.2.9200.0   < 6.2.9200.25923
 Create a notification for this product.
   Microsoft Windows Server 2012 R2 Version: 6.3.9600.0   < 6.3.9600.23022
 Create a notification for this product.
   Microsoft Windows Server 2012 R2 (Server Core installation) Version: 6.3.9600.0   < 6.3.9600.23022
 Create a notification for this product.
   Microsoft Windows Server 2016 Version: 10.0.14393.0   < 10.0.14393.8868
 Create a notification for this product.
   Microsoft Windows Server 2016 (Server Core installation) Version: 10.0.14393.0   < 10.0.14393.8868
 Create a notification for this product.
   Microsoft Windows Server 2019 Version: 10.0.17763.0   < 10.0.17763.8389
 Create a notification for this product.
   Microsoft Windows Server 2019 (Server Core installation) Version: 10.0.17763.0   < 10.0.17763.8389
 Create a notification for this product.
   Microsoft Windows Server 2022 Version: 10.0.20348.0   < 10.0.20348.4773
 Create a notification for this product.
   Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Version: 10.0.25398.0   < 10.0.25398.2149
 Create a notification for this product.
   Microsoft Windows Server 2025 Version: 10.0.26100.0   < 10.0.26100.32370
 Create a notification for this product.
   Microsoft Windows Server 2025 (Server Core installation) Version: 10.0.26100.0   < 10.0.26100.32370
 Create a notification for this product.
CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog

Date added: 2026-02-10

Due date: 2026-03-03

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.

Used in ransomware: Unknown

Notes: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21525 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21525

Show details on NVD website

To clipboard 

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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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