Apr 2026: ASP.NET Core Elevation of Privilege Vulnerability
CVE-2026-40372 Published on April 21, 2026

ASP.NET Core Elevation of Privilege Vulnerability
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-40372 is exploitable with network access, and does not require authorization privileges or user interaction. 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 no impact on availability.

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

Weakness Type

Improper Verification of Cryptographic Signature

The software does not verify, or incorrectly verifies, the cryptographic signature for data.


Products Associated with CVE-2026-40372

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-40372 are published in these products:

Microsoft ASP.NET Core
 
Microsoft Visual Studio 2026
 
Canonical Ubuntu Linux
 
Red Hat Enterprise Linux (RHEL)
 

Affected Versions

Microsoft ASP.NET Core 10.0: Microsoft Visual Studio 2026 version 18.5: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9:

Exploit Probability

EPSS
10.35%
Percentile
95.13%

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.