CVE-2026-77499: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
CVE-2026-77499 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving a type confusion flaw in the DHCP Server component. This flaw allows an unauthorized attacker to cause a denial of service over a network by accessing resources using incompatible types. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-77499 and classified under CWE-843 (Access of Resource Using Incompatible Type), affects the DHCP Server in Microsoft Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows an attacker without privileges or user interaction to trigger a denial of service condition by exploiting type confusion in resource access. The CVSS v3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges required, and no user interaction needed. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation results in denial of service (DoS) over the network, impacting availability of the DHCP Server service on affected Windows 10 Version 1607 systems. There is no confidentiality or integrity impact reported. No known exploits are currently observed 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-2026-77499 to remediate this vulnerability.
CVE-2026-77499: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
Description
CVE-2026-77499 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving a type confusion flaw in the DHCP Server component. This flaw allows an unauthorized attacker to cause a denial of service over a network by accessing resources using incompatible types. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-77499 and classified under CWE-843 (Access of Resource Using Incompatible Type), affects the DHCP Server in Microsoft Windows 10 Version 1607 (build 10.0.14393.0). The flaw allows an attacker without privileges or user interaction to trigger a denial of service condition by exploiting type confusion in resource access. The CVSS v3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges required, and no user interaction needed. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation results in denial of service (DoS) over the network, impacting availability of the DHCP Server service on affected Windows 10 Version 1607 systems. There is no confidentiality or integrity impact reported. No known exploits are currently observed 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-2026-77499 to remediate this vulnerability.
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-2026-77499","vendor":"Microsoft"}]
Threat ID: 6aa04558acd9273b49fa9ee9
Added to database: 09/08/2026, 17:26:48 UTC
Last enriched: 09/08/2026, 22:07:21 UTC
Last updated: 09/08/2026, 22:07:21 UTC
Views: 3
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