CVE-2026-70570: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
CVE-2026-70570 is a high-severity use-after-free vulnerability in the Windows Routing and Remote Access Service (RRAS) affecting multiple versions of Microsoft Windows 10, including version 1607 and later builds. This vulnerability allows remote code execution, enabling an attacker to gain unauthorized access to the victim's machine without user interaction. An official fix is available from Microsoft.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-70570 is a use-after-free vulnerability (CWE-416) in the Windows Routing and Remote Access Service (RRAS) component of Microsoft Windows 10, including version 1607 and later builds. The flaw allows remote attackers to execute arbitrary code on affected systems, potentially gaining unauthorized access. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity, with attack vector requiring adjacent network access and high attack complexity. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely on the affected Windows 10 systems, leading to full compromise including confidentiality, integrity, and availability impacts. The attacker does not require privileges or user interaction but must have access to an adjacent network. This could result in unauthorized access to the victim's machine.
Mitigation Recommendations
Microsoft has released an official fix for CVE-2026-70570. It is strongly recommended to apply the security updates provided by Microsoft for the affected Windows 10 versions to remediate this vulnerability. No additional mitigation actions are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T19:47:18.930Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70570","vendor":"Microsoft"}]
Threat ID: 6aa0453bacd9273b49fa9ba5
Added to database: 09/08/2026, 17:26:19 UTC
Last enriched: 10/17/2026, 20:40:37 UTC
Last updated: 10/22/2026, 13:15:23 UTC
Views: 29
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