---
cve: "CVE-2026-40372"
severity: "CRITICAL"
cvss: 9.1
epss: "11.2%"
vendor: "Microsoft"
kev: false
exploited: false
published: "2026-04-21 19:20:50"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T23:16:05+02:00"
---

# CVE-2026-40372

> 9.1 CRITICAL

## Beschreibung

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

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 2130ebfe92a66d6a7a79647ca1f209f10cb9a0eb (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40372) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_