CVE-2026-62897ImportantRevised 13 Aug
.NET Framework Remote Code Execution Vulnerability
Assessment
Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to execute code locally.
- Severity
- Important
- CVSS base score
- 7.0CVSS:3.1/
AV:L/ AC:H/ PR:N/ UI:R/ S:U/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Remote Code Execution
- EPSS, next 30 days
- 0.4%Higher than 28.2% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- .NET Framework
- Weakness
- CWE-190: Integer Overflow or Wraparound
- Issued by
- Microsoft
- Published
- 11 Aug 2026 · August 2026
- Last revised
- 13 Aug 2026Removed Linux and macOS products from the Affected Software table. This is an informational change only.
Updates that fix it
7 KBs| KB | Type | Restart | Applies to | Other CVEs |
|---|---|---|---|---|
| KB5120698 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems | All CVEs in KB5120698 |
| KB5120703 | Security Update | — | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems | All CVEs in KB5120703 |
| KB5120711 | Security Update | — | Microsoft .NET Framework 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems, Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 for x64-based Systems | All CVEs in KB5120711 |
| KB5120747 | Security Update | — | Microsoft .NET Framework 3.5 on Windows 11 Version 26H1 for ARM64-based Systems, Microsoft .NET Framework 3.5 on Windows 11 version 26H1 for x64-based Systems | All CVEs in KB5120747 |
| KB5122104 | Security Update | — | .NET 8.0 installed on Windows | All CVEs in KB5122104 |
| KB5122105 | Security Update | — | .NET 9.0 installed on Windows | All CVEs in KB5122105 |
| KB5122106 | Security Update | — | .NET 10.0 installed on Windows | All CVEs in KB5122106 |
Affected products
Developer Tools11 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 4.8 on Windows 10 Version 1809 for ARM64-based Systems
- Microsoft .NET Framework 3.5 on Windows 11 Version 26H1 for ARM64-based Systems
- Microsoft .NET Framework 3.5 on Windows 11 version 26H1 for x64-based Systems
- Microsoft .NET Framework 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems
- Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 for x64-based Systems
- Microsoft Visual Studio 2022 version 17.14
- Microsoft Visual Studio 2026 version 18.8