CVE-2026-26156: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-26156) is a heap-based buffer overflow in the Windows Hyper-V component of Windows 10 Version 1607 (build 10.0.14393.0). It enables an unauthorized attacker to execute code locally, potentially leading to full system compromise. The vulnerability has been assigned a CVSS v3.1 base score of 7.8, indicating high severity. Microsoft has published an official fix to address this issue, as detailed in their security advisory.
Potential Impact
Successful exploitation allows an unauthorized local attacker to execute arbitrary code with elevated privileges on affected Windows 10 Version 1607 systems. This can lead to complete system compromise, including confidentiality, integrity, and availability impacts.
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-2026-26156 to remediate this vulnerability.
CVE-2026-26156: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-26156) is a heap-based buffer overflow in the Windows Hyper-V component of Windows 10 Version 1607 (build 10.0.14393.0). It enables an unauthorized attacker to execute code locally, potentially leading to full system compromise. The vulnerability has been assigned a CVSS v3.1 base score of 7.8, indicating high severity. Microsoft has published an official fix to address this issue, as detailed in their security advisory.
Potential Impact
Successful exploitation allows an unauthorized local attacker to execute arbitrary code with elevated privileges on affected Windows 10 Version 1607 systems. This can lead to complete system compromise, including confidentiality, integrity, and availability impacts.
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-2026-26156 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-11T16:24:51.136Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26156","vendor":"Microsoft"}]
Threat ID: 69de7a1682d89c981fd6a639
Added to database: 04/14/2026, 17:32:06 UTC
Last enriched: 06/19/2026, 16:58:42 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 125
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.