CVE-2026-77893: 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-2026-77893) is an out-of-bounds read issue classified under CWE-125 in the Windows DHCP Server. It affects Windows 10 Version 1607 and other specified versions, allowing an unauthenticated attacker to trigger a denial of service condition remotely. The CVSS v3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation results in denial of service 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 confidentiality or integrity impact reported. The vulnerability can be exploited remotely without authentication or user interaction.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77893 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-21T17:26:55.612Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77893","vendor":"Microsoft"}]
Threat ID: 6aa0455bacd9273b49faa01f
Added to database: 09/08/2026, 17:26:51 UTC
Last enriched: 10/14/2026, 21:58:25 UTC
Last updated: 10/24/2026, 03:05:11 UTC
Views: 20
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