CVE-2026-42910: CWE-787: Out-of-bounds Write in Microsoft Windows 11 Version 24H2
Out-of-bounds write in Windows Hotpatch Monitoring Service allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-42910 and classified under CWE-787 (Out-of-bounds Write), affects Windows 11 Version 24H2 (build 10.0.26100.0). It occurs in the Windows Hotpatch Monitoring Service and enables an attacker with local authorized access to perform an out-of-bounds write, potentially leading to privilege escalation. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this issue.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate their privileges on the affected system, potentially gaining higher-level access than intended. The vulnerability impacts confidentiality, integrity, and availability of the system as indicated by the CVSS vector. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the provided security update from the Microsoft Security Response Center as soon as possible to remediate the issue. No additional mitigation steps are specified by the vendor.
CVE-2026-42910: CWE-787: Out-of-bounds Write in Microsoft Windows 11 Version 24H2
Description
Out-of-bounds write in Windows Hotpatch Monitoring Service allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-42910 and classified under CWE-787 (Out-of-bounds Write), affects Windows 11 Version 24H2 (build 10.0.26100.0). It occurs in the Windows Hotpatch Monitoring Service and enables an attacker with local authorized access to perform an out-of-bounds write, potentially leading to privilege escalation. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has released an official fix to remediate this issue.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate their privileges on the affected system, potentially gaining higher-level access than intended. The vulnerability impacts confidentiality, integrity, and availability of the system as indicated by the CVSS vector. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the provided security update from the Microsoft Security Response Center as soon as possible to remediate the issue. No additional mitigation steps are specified by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T22:35:54.968Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42910","vendor":"Microsoft"}]
Threat ID: 6a284cc48dd33fbd8566480e
Added to database: 06/09/2026, 17:26:28 UTC
Last enriched: 08/14/2026, 13:30:56 UTC
Last updated: 09/11/2026, 07:31:53 UTC
Views: 74
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