CVE-2026-77498: 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 (CVE-2026-77498) is an out-of-bounds read issue in the Windows DHCP Server component affecting multiple Windows versions including Windows 10 Version 1607 and others. An attacker without privileges can exploit this flaw remotely to cause a denial of service condition. The vulnerability is tracked under CWE-125 and has a CVSS v3.1 score of 7.5 indicating high severity. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation results in denial of service (DoS) over the network by causing the Windows DHCP Server to perform an out-of-bounds read, potentially crashing or destabilizing the service. There is no impact on confidentiality or integrity according to the CVSS vector.
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-2026-77498. No additional mitigations are indicated by the vendor.
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-2026-77498","vendor":"Microsoft"}]
Threat ID: 6aa04558acd9273b49fa9ee7
Added to database: 09/08/2026, 17:26:48 UTC
Last enriched: 10/14/2026, 21:57:05 UTC
Last updated: 10/23/2026, 15:10:15 UTC
Views: 25
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