High severity · published May 12, 2026
CVE-2026-35433
.NET Elevation of Privilege Vulnerability
7.3
CVSS
0.8%
EPSS
No
On KEV
Description
Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N1
.NET 10.0 · Microsoft
10.0.0 before 10.0.8 · source: vendor
N8
.NET 8.0 · Microsoft
8.0.0 before 8.0.27 · source: vendor
N9
.NET 9.0 · Microsoft
9.0.0 before 9.0.16 · source: vendor
MN
Microsoft .NET Framework 3.5 · Microsoft
3.5.0 before 4.8.9334.0 and 4.8.4802.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.7.2 · Microsoft
4.7.0 before 4.8.9334.0 and 4.8.4802.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.8 · Microsoft
4.8.0 before 4.8.9334.0 and 4.8.4802.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.8.1 · Microsoft
4.8.1 before 4.8.9334.0 and 4.8.4802.0 · source: vendor
MN
Microsoft .NET Framework 4.8 · Microsoft
4.8.0 before 4.8.9334.0 and 4.8.4802.0 · source: vendor
NE
.net · Microsoft
8.0.0 before 8.0.27; 9.0.0 before 9.0.16; 10.0.0 before 10.0.8 · source: NVD
NF
.net Framework · Microsoft
4.8; 3.5; 3.5; 4.8.1; 3.5; 4.8; +2 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35433
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35433
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35433
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-35433
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2476577
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35433.json
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