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Case File

CVE-2021-33790

CRITICAL · CVSS 9.8 EPSS 2.84% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-05-31 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit remote code execution code execution
GitHub PoC Links
github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-33790
Severity
CRITICAL
CVSS
9.8
EPSS
2.84%

Original NVD Description

The RebornCore library before 4.7.3 allows remote code execution because it deserializes untrusted data in ObjectInputStream.readObject as part of reborncore.common.network.ExtendedPacketBuffer. An attacker can instantiate any class on the classpath with any data. A class usable for exploitation might or might not be present, depending on what Minecraft modifications are installed.