CVE-2026-32177ImportantRevised 19 Jun
.NET Elevation of Privilege Vulnerability
Assessment
Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
- Severity
- Important
- CVSS base score
- 7.3CVSS:3.1/
AV:L/ AC:L/ PR:N/ UI:R/ S:U/ C:H/ I:H/ A:L/ E:U/ RL:O/ RC:C - Impact
- Elevation of Privilege
- EPSS, next 30 days
- 0.6%Higher than 45% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
- Public exploit code
- No Nuclei template lists it
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- .NET
- Weakness
- CWE-122: Heap-based Buffer Overflow
- Issued by
- Microsoft
- Published
- 12 May 2026 · May 2026
- Last revised
- 19 Jun 2026Removed incorrectly added rows from the Security Updates table. This is an informational change only.
Updates that fix it
20 KBs| KB | Type | Restart | Applies to | Other CVEs |
|---|---|---|---|---|
| KB5087048 | Security Update | — | Microsoft .NET Framework 3.5 on Windows Server 2012 | All CVEs in KB5087048 |
| KB5087049 | Security Update | — | Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | All CVEs in KB5087049 |
| KB5087051 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for x64-based Systems, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 | All CVEs in KB5087051 |
| KB5087053 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems | All CVEs in KB5087053 |
| KB5087054 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems | All CVEs in KB5087054 |
| KB5087055 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H1 for x64-based Systems | All CVEs in KB5087055 |
| KB5087058 | Security Update | Required | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems | All CVEs in KB5087058 |
| KB5087059 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 | All CVEs in KB5087059 |
| KB5087061 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems, Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 | All CVEs in KB5087061 |
| KB5087062 | Security Update | — | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | All CVEs in KB5087062 |
| KB5087063 | Security Update | — | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | All CVEs in KB5087063 |
| KB5087064 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems | All CVEs in KB5087064 |
| KB5087065 | Security Update | — | Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems, Microsoft .NET Framework 4.8 on Windows Server 2016 | All CVEs in KB5087065 |
| KB5087066 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | All CVEs in KB5087066 |
| KB5087067 | Security Update | — | Microsoft .NET Framework 4.8 on Windows Server 2012 | All CVEs in KB5087067 |
| KB5087068 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 | All CVEs in KB5087068 |
| KB5087069 | Security Update | — | Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | All CVEs in KB5087069 |
| KB5093446 | Security Update | — | .NET 10.0 installed on Windows | All CVEs in KB5093446 |
| KB5093447 | Security Update | — | .NET 8.0 installed on Windows | All CVEs in KB5093447 |
| KB5093448 | Security Update | — | .NET 9.0 installed on Windows | All CVEs in KB5093448 |
Affected products
Developer Tools36 affected products
- .NET 10.0 installed on Windows
- .NET 8.0 installed on Windows
- .NET 9.0 installed on Windows
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
- Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H1 for x64-based Systems
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025
- Microsoft .NET Framework 3.5 on Windows Server 2012
- Microsoft .NET Framework 3.5 on Windows Server 2012 R2
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012
- Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2
- Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems
- Microsoft .NET Framework 4.8 on Windows Server 2012
- Microsoft .NET Framework 4.8 on Windows Server 2012 R2
- Microsoft .NET Framework 4.8 on Windows Server 2016
- Microsoft Visual Studio 2022 version 17.12
- Microsoft Visual Studio 2022 version 17.14
- Microsoft Visual Studio 2026 version 18.5