CVE-2026-40372

Published Apr 21, 2026

Last updated 2 months ago

CVSS critical 9.1

Network

Overview

Description: Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
Source: secure@microsoft.com
NVD status: Analyzed
Products: asp.net_core

Risk scores

CVSS 3.1

Type: Primary
Base score: 9.1
Impact score: 5.2
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: CRITICAL

Weaknesses

secure@microsoft.com: CWE-347

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "001BC473-2D30-41BA-8E83-E80A22F519D3",
            "versionEndExcluding": "10.0.7",
            "versionStartIncluding": "10.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 3.1

Weaknesses

Social media

Configurations

Related CVEs

References