CVE-2026-77896: CWE-190: Integer Overflow or Wraparound in Microsoft Windows 10 Version 1607
Description
Integer overflow or wraparound in Remote Desktop Client allows an unauthorized attacker to deny service over a network.
CVSS v3.1
Score 6.5medium
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
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 involves an integer overflow or wraparound condition in the Remote Desktop Client on Windows 10 Version 1607. Exploitation can lead to denial of service by causing the affected service to crash or become unresponsive. The vulnerability has a CVSS 3.1 base score of 6.5, indicating a medium severity level. It requires no privileges and user interaction is required. The vulnerability affects multiple Windows 10 builds prior to their respective patch versions. Microsoft has published an official fix for this issue.
Potential Impact
An attacker can remotely cause a denial of service condition on affected Windows 10 systems by exploiting this integer overflow vulnerability in the Remote Desktop Client. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Microsoft has released official patches addressing this vulnerability. Users and administrators should apply the updates for their respective Windows 10 versions as listed in the vendor advisory. No additional mitigation is required once the patch is applied.
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-2026-77896","vendor":"Microsoft"}]
Threat ID: 6aa0455bacd9273b49faa026
Added to database: 09/08/2026, 17:26:51 UTC
Last enriched: 10/14/2026, 21:58:39 UTC
Last updated: 10/23/2026, 15:10:15 UTC
Views: 28
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