Microsoft ASP.NET Core up to 10.0.6 signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Microsoft ASP.NET Core up to 10.0.6. This affects an unknown function. This manipulation causes signature verification. This vulnerability is tracked as CVE-2026-40372. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Microsoft ASP.NET Core up to 10.0.6. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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

The advisory is shared at msrc.microsoft.com. This vulnerability is known as CVE-2026-40372 since 04/12/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/24/2026).

The vulnerability scanner Nessus provides a plugin with the ID 310116 (Microsoft ASP.NET (April 2026)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 10.0.7 eliminates this vulnerability.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202604-4193), Tenable (310116) and EUVD (EUVD-2026-24249). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.2

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.1
CNA Vector (microsoft): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 310116
Nessus Name: Microsoft ASP.NET (April 2026)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: ASP.NET Core 10.0.7

Timelineinfo

04/12/2026 CVE reserved
04/21/2026 +9 days Advisory disclosed
04/21/2026 +0 days VulDB entry created
04/24/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2026-40372 (🔒)
GCVE (CVE): GCVE-0-2026-40372
GCVE (VulDB): GCVE-100-358597
EUVD: 🔒
CNNVD: CNNVD-202604-4193 - Microsoft ASP.NET Core 数据伪造问题漏洞

Entryinfo

Created: 04/21/2026 22:38
Updated: 04/24/2026 21:40
Changes: 04/21/2026 22:38 (62), 04/22/2026 19:33 (6), 04/23/2026 18:12 (1), 04/24/2026 21:40 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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