CVE-2026-70586: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
CVE-2026-70586 is a heap-based buffer overflow vulnerability in Windows Paint on Microsoft Windows 10 Version 1607. This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity with a CVSS score of 8.8. An official fix is available from Microsoft.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-70586) is a heap-based buffer overflow in the Windows Paint application on Windows 10 Version 1607 (build 10.0.14393.0). It enables an attacker without privileges to execute arbitrary code remotely, potentially leading to full system compromise. The vulnerability is classified under CWE-122. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows remote code execution with high impact on confidentiality, integrity, and availability. An attacker can run arbitrary code on the affected system without prior authentication, potentially gaining full control.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70586 to remediate this vulnerability.
CVE-2026-70586: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
CVE-2026-70586 is a heap-based buffer overflow vulnerability in Windows Paint on Microsoft Windows 10 Version 1607. This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity with a CVSS score of 8.8. An official fix is available from Microsoft.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-70586) is a heap-based buffer overflow in the Windows Paint application on Windows 10 Version 1607 (build 10.0.14393.0). It enables an attacker without privileges to execute arbitrary code remotely, potentially leading to full system compromise. The vulnerability is classified under CWE-122. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows remote code execution with high impact on confidentiality, integrity, and availability. An attacker can run arbitrary code on the affected system without prior authentication, potentially gaining full control.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70586 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-04T19:47:18.931Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70586","vendor":"Microsoft"}]
Threat ID: 6aa0453eacd9273b49fa9c05
Added to database: 09/08/2026, 17:26:22 UTC
Last enriched: 09/09/2026, 00:22:20 UTC
Last updated: 09/09/2026, 01:29:55 UTC
Views: 7
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