CVE-2026-77501: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 1607
Description
Out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
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
This vulnerability (CWE-125) is an out-of-bounds read in the Windows DHCP Server that can be triggered by an unauthenticated attacker remotely over the network. Successful exploitation results in denial of service (DoS) by crashing the DHCP Server component. The CVSS 3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Multiple Windows 10 and Windows Server versions are affected, with patches released by Microsoft to address the issue.
Potential Impact
The vulnerability allows an unauthenticated attacker to cause a denial of service condition on affected Windows DHCP Servers by triggering an out-of-bounds read. There is no confidentiality or integrity impact reported. The primary impact is service disruption.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows versions as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77501. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-20T20:11:33.673Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77501","vendor":"Microsoft"}]
Threat ID: 6aa04558acd9273b49fa9eed
Added to database: 09/08/2026, 17:26:48 UTC
Last enriched: 10/14/2026, 21:57:18 UTC
Last updated: 10/21/2026, 13:40:31 UTC
Views: 18
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