CVE-2026-77890: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
CVE-2026-77890 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving a type confusion flaw in the Windows DHCP Server. This flaw allows an unauthorized attacker to cause a denial of service over a network. The vulnerability has an official fix available from Microsoft.
AI Analysis
Technical Summary
This vulnerability is classified as CWE-843 (Access of Resource Using Incompatible Type, or type confusion) and affects Windows 10 Version 1607, specifically version 10.0.14393.0. It occurs in the Windows DHCP Server component and can be exploited remotely without privileges or user interaction to cause a denial of service condition. The CVSS v3.1 base score is 7.5, indicating high severity. Microsoft has published an official fix to address this issue.
Potential Impact
An attacker can remotely exploit this vulnerability to cause a denial of service on the affected Windows DHCP Server, disrupting network services. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are currently reported in the wild.
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-2026-77890 to remediate this vulnerability.
CVE-2026-77890: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
Description
CVE-2026-77890 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving a type confusion flaw in the Windows DHCP Server. This flaw allows an unauthorized attacker to cause a denial of service over a network. The vulnerability has an official fix available from Microsoft.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is classified as CWE-843 (Access of Resource Using Incompatible Type, or type confusion) and affects Windows 10 Version 1607, specifically version 10.0.14393.0. It occurs in the Windows DHCP Server component and can be exploited remotely without privileges or user interaction to cause a denial of service condition. The CVSS v3.1 base score is 7.5, indicating high severity. Microsoft has published an official fix to address this issue.
Potential Impact
An attacker can remotely exploit this vulnerability to cause a denial of service on the affected Windows DHCP Server, disrupting network services. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are currently reported in the wild.
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-2026-77890 to remediate this vulnerability.
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-2026-77890","vendor":"Microsoft"}]
Threat ID: 6aa0455aacd9273b49fa9fda
Added to database: 09/08/2026, 17:26:50 UTC
Last enriched: 09/08/2026, 21:52:14 UTC
Last updated: 09/08/2026, 21:52:14 UTC
Views: 3
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