CVE-2026-77888: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
CVE-2026-77888 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 does not impact confidentiality or integrity but results in service disruption. An official fix is available from Microsoft.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-843 (Access of Resource Using Incompatible Type), exists in the Windows DHCP Server component of Windows 10 Version 1607 (build 10.0.14393.0). It allows an attacker without privileges or user interaction to trigger a denial of service condition by exploiting a type confusion error. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation results in denial of service (DoS) over the network, disrupting DHCP server availability. There is no impact on confidentiality or integrity. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77888 to remediate this vulnerability.
CVE-2026-77888: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1607
Description
CVE-2026-77888 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 does not impact confidentiality or integrity but results in service disruption. An official fix is available from Microsoft.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-843 (Access of Resource Using Incompatible Type), exists in the Windows DHCP Server component of Windows 10 Version 1607 (build 10.0.14393.0). It allows an attacker without privileges or user interaction to trigger a denial of service condition by exploiting a type confusion error. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation results in denial of service (DoS) over the network, disrupting DHCP server availability. There is no impact on confidentiality or integrity. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77888 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-21T17:26:55.611Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77888","vendor":"Microsoft"}]
Threat ID: 6aa04559acd9273b49fa9fd6
Added to database: 09/08/2026, 17:26:49 UTC
Last enriched: 09/08/2026, 21:52:22 UTC
Last updated: 09/08/2026, 21:52:22 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.