May 2026: .NET Elevation of Privilege Vulnerability
CVE-2026-35433 Published on May 12, 2026

.NET Elevation of Privilege Vulnerability
Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-35433 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and a small impact on availability.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
LOW

Weakness Types

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Integer Overflow or Wraparound

The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. An integer overflow or wraparound occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may wrap to become a very small or negative number. While this may be intended behavior in circumstances that rely on wrapping, it can have security consequences if the wrap is unexpected. This is especially the case if the integer overflow can be triggered using user-supplied inputs. This becomes security-critical when the result is used to control looping, make a security decision, or determine the offset or size in behaviors such as memory allocation, copying, concatenation, etc.


Products Associated with CVE-2026-35433

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-35433 are published in these products:

Microsoft Net
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Hummingbird
 

Affected Versions

Microsoft .NET 10.0: Microsoft .NET 8.0: Microsoft .NET 9.0: Microsoft .NET Framework 3.5: Microsoft .NET Framework 3.5 AND 4.7.2: Microsoft .NET Framework 3.5 AND 4.8: Microsoft .NET Framework 3.5 AND 4.8.1: Microsoft .NET Framework 4.8: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9: Red Hat Hardened Images:

Exploit Probability

EPSS
0.53%
Percentile
40.41%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.