CVE-2026-49172: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Windows FTP Service allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 9.8critical
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 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 (CVE-2026-49172) involves a heap-based buffer overflow in the Windows FTP Service component of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). The flaw enables remote code execution by an unauthenticated attacker over the network. The CVSS v3.1 base score is 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability allows an attacker to execute arbitrary code remotely on the affected system without any privileges or user interaction, potentially leading to full system compromise. The impact includes complete loss of confidentiality, integrity, and availability of the affected system.
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-2026-49172 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-27T23:44:09.623Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49172","vendor":"Microsoft"}]
Threat ID: 6a566f6b68715ace43e6b3d2
Added to database: 07/14/2026, 17:18:35 UTC
Last enriched: 08/13/2026, 14:21:15 UTC
Last updated: 10/13/2026, 06:48:17 UTC
Views: 157
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