---
cve: "CVE-2021-23758"
severity: "CRITICAL"
cvss: 9.8
epss: "66.2%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2021-12-03 20:15:07"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T07:50:41+02:00"
---

# CVE-2021-23758

> 9.8 CRITICAL

## Beschreibung

All versions of package ajaxpro.2 are vulnerable to Deserialization of Untrusted Data due to the possibility of deserialization of arbitrary .NET classes, which can be abused to gain remote code execution.

## CVSS-Vektor

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

| 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 | Hoch | bad |

## Patch verfügbar (OSV)

- 5955f9eace7bfe3ecba7f27778c4d0b56eb06287 (Commit)
- b0e63be5f0bb20dfce507cb8a1a9568f6e73de57 (Commit)

## Referenzen

- <http://packetstormsecurity.com/files/175677/AjaxPro-Deserialization-Remote-Code-Execution.html>
- <https://github.com/michaelschwarz/Ajax.NET-Professional/commit/b0e63be5f0bb20dfce507cb8a1a9568f6e73de57>
- <https://snyk.io/vuln/SNYK-DOTNET-AJAXPRO2-1925971>
- <https://blog.talosintelligence.com/uat-10147-chinese-speaking-adversary-integrates-agentic-ai-into-post-compromise-operations/>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-23758>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-23758) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_