CVE-2026-62816: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-62816) involves a heap-based buffer overflow in the RMCAST driver of Windows 10 Version 1607 (build 10.0.14393.0). An attacker without privileges and no user interaction required can exploit this flaw remotely over an adjacent network to achieve high impact, including full confidentiality, integrity, and availability compromise. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows remote code execution by an unauthorized attacker on affected Windows 10 Version 1607 systems, potentially leading to complete system compromise. The CVSS score of 8.8 reflects high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported at this time.
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-2026-62816 to remediate this vulnerability.
CVE-2026-62816: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-62816) involves a heap-based buffer overflow in the RMCAST driver of Windows 10 Version 1607 (build 10.0.14393.0). An attacker without privileges and no user interaction required can exploit this flaw remotely over an adjacent network to achieve high impact, including full confidentiality, integrity, and availability compromise. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows remote code execution by an unauthorized attacker on affected Windows 10 Version 1607 systems, potentially leading to complete system compromise. The CVSS score of 8.8 reflects high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported at this time.
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-2026-62816 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-14T21:08:07.966Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62816","vendor":"Microsoft"}]
Threat ID: 6a7b581abf8831d539156038
Added to database: 08/11/2026, 17:12:58 UTC
Last enriched: 08/11/2026, 21:26:53 UTC
Last updated: 08/12/2026, 02:41:10 UTC
Views: 3
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