Vulnerability Intelligence Report
ASP.NET Core Elevation of Privilege Vulnerability
CVE-2026-40372
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
No Active Exploit Signals
CVSS Base Score
9.1
CRITICAL
Exploitability:3.9
Impact Score:5.2
EPSS Probability:0.82%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-347 ↗CWE-347: Improper Verification of Cryptographic Signature
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | ASP.NET Core 10.0 | 10.0 < 10.0.7 (affected) |
| Microsoft | Microsoft Visual Studio 2026 version 18.5 | 18.5.0 < 18.5.2 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.824%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-04-11T23:06:15 |
| Published | 2026-04-21T19:20:50 |
| Patch Date | 2026-04-21 |
| Last Updated | 2026-10-15T15:53:48 |
Community Chatter & Buzz