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High severity · published Aug 11, 2026
CVE-2026-65810
.NET Framework Elevation of Privilege Vulnerability
7.8
CVSS
0.4%
EPSS
No
On KEV
Description
Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MN
Microsoft .NET Framework 3.5 · Microsoft
3.5.0 before 2.0.50727.9183 & 3.0.30729.9169 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 · Microsoft
3.0.0.0 before 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.7.2 · Microsoft
4.7.0 before 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.8 · Microsoft
4.8.0 before 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.8.1 · Microsoft
4.8.1 before 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0 · source: vendor
MN
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 · Microsoft
4.7.0 before 4.7.4144.0 · source: vendor
MN
Microsoft .NET Framework 4.8 · Microsoft
4.8.0 before 4.8.4805.0 · source: vendor
MN
Microsoft .NET Framework 4.8.1 · Microsoft
4.8.0.0 before 4.8.9344.0 · source: vendor
NF
.net Framework · Microsoft
3.5; 3.5; 4.6.2; 4.7; 4.7.1; 4.7.2; +12 more · source: NVD
Affected product
MN
Microsoft .NET Framework 3.5
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65810
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-65810
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65810
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