CVE-2026-62817: CWE-787: Out-of-bounds Write in Microsoft Windows 10 Version 1809
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write in the Windows DNS service on Windows 10 Version 1809 (build 10.0.17763.0). The flaw could allow an attacker on an adjacent network to execute arbitrary code on the affected system without requiring privileges or user interaction. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation could lead to remote code execution with high impact on system confidentiality, integrity, and availability. The attacker does not require privileges or user interaction and must be on an adjacent network to the target system.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62817 to remediate this vulnerability.
CVE-2026-62817: CWE-787: Out-of-bounds Write in Microsoft Windows 10 Version 1809
Description
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write in the Windows DNS service on Windows 10 Version 1809 (build 10.0.17763.0). The flaw could allow an attacker on an adjacent network to execute arbitrary code on the affected system without requiring privileges or user interaction. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation could lead to remote code execution with high impact on system confidentiality, integrity, and availability. The attacker does not require privileges or user interaction and must be on an adjacent network to the target system.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62817 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-14T21:10:38.081Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62817","vendor":"Microsoft"}]
Threat ID: 6a7b581abf8831d53915603b
Added to database: 08/11/2026, 17:12:58 UTC
Last enriched: 08/11/2026, 21:26:47 UTC
Last updated: 08/12/2026, 02:41:08 UTC
Views: 3
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