CVE Tools
Home/Vulnerability/CVE-2026-40372

CVE-2026-40372

ASP.NET Core Elevation of Privilege Vulnerability

Published: Apr 21, 2026Updated: Apr 21, 2026 Sources: CVE List
NVD MITRE
9.1CVSS
CRITICAL

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

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None

Weaknesses

CWE-347CWE-347: Improper Verification of Cryptographic Signature

Affected Products

ASP.NET Core 10.0
Microsoft

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40372
msrc.microsoft.com

Timeline

Published
Apr 21, 2026
Last Updated
Apr 21, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-40372 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
AI-powered analysis
Plain-language impact assessment and exploitation scenario
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows