CVE-2026-65810 — .NET Framework Elevation of Privilege Vulnerability

Executive Summary

Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally.

Overview

7.8

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Elevation of Privilege

Released Aug 11 2026

Last Updated Aug 11 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00351 — 0.28084 percentile

NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.8

EPSS Score

0.00351

probability of exploitation in the next 30 days

0.28084 percentile - updated 2026-08-14

View on FIRST.org

Affected Products

58 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems	`5120418 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems	`5120418 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016	`5120418 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)	`5120418 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems	`5120698 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems	`5120698 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems	`5120698 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019	`5120698 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)	`5120698 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems	`5120703 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems	`5120703 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems	`5120703 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for 32-bit Systems	`5120701 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems	`5120701 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems	`5120701 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for 32-bit Systems	`5120701 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems	`5120701 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems	`5120701 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019	`5120703 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)	`5120703 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022	`5120705 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation)	`5120705 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for 32-bit Systems	`5120709 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems	`5120709 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems	`5120709 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for 32-bit Systems	`5120709 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems	`5120709 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems	`5120709 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for ARM64-based Systems	`5120713 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems	`5120713 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems	`5120710 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems	`5120710 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for ARM64-based Systems	`5120708 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for x64-based Systems	`5120708 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022	`5120714 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 (Server Core installation)	`5120714 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025	`5120708 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 (Server Core installation)	`5120708 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 on Windows 11 Version 26H1 for ARM64-based Systems	`5120747 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 on Windows 11 version 26H1 for x64-based Systems	`5120747 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 on Windows Server 2012	`5120716 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation)	`5120716 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 on Windows Server 2012 R2	`5120695 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation)	`5120695 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012	`5120699 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation)	`5120699 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2	`5120700 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation)	`5120700 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems	`5120702 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems	`5120702 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012	`5120704 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)	`5120704 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012 R2	`5120706 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)	`5120706 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8 on Windows Server 2016	`5120702 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)	`5120702 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems	`5120711 (Security Update)`	Important	Elevation of Privilege	Maybe
Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 for x64-based Systems	`5120711 (Security Update)`	Important	Elevation of Privilege	Maybe

Patches

19 patches

Article	Type	Restart
`5120418`	Security Update	Maybe
`5120698`	Security Update	Maybe
`5120703`	Security Update	Maybe
`5120701`	Security Update	Maybe
`5120705`	Security Update	Maybe
`5120709`	Security Update	Maybe
`5120713`	Security Update	Maybe
`5120710`	Security Update	Maybe
`5120708`	Security Update	Maybe
`5120714`	Security Update	Maybe
`5120747`	Security Update	Maybe
`5120716`	Security Update	Maybe
`5120695`	Security Update	Maybe
`5120699`	Security Update	Maybe
`5120700`	Security Update	Maybe
`5120702`	Security Update	Maybe
`5120704`	Security Update	Maybe
`5120706`	Security Update	Maybe
`5120711`	Security Update	Maybe

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Kevin Gosse

References

MSRC Advisory MITRE NVD