CVE-2026-40372 — CRITICAL (9.1)

Q: What is CVE-2026-40372?

CVE-2026-40372 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.

Q: How severe is CVE-2026-40372?

CVE-2026-40372 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2026-40372?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Asp.Net Core.

Vulnerability Description

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

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Microsoft	Asp.Net Core	>= 10.0.0, < 10.0.7

Related Weaknesses (CWE)

CWE-347

References

FAQ

What is CVE-2026-40372?

CVE-2026-40372 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.

How severe is CVE-2026-40372?

CVE-2026-40372 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-40372?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Asp.Net Core.