Local Privilege Escalation in Epic Games Easy Anti-Cheat by Epic Games
CVE-2021-47739

8.5HIGH

Key Information:

Vendor

Epic Games

Status
Easy Anti-cheat
Vendor
CVE Published:
23 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47739?

Epic Games Easy Anti-Cheat version 4.0 has a vulnerability that allows a local non-privileged user to execute arbitrary code with elevated system privileges. This arises from an unquoted service path, which can be exploited by malicious actors. By manipulating the service configuration, attackers may inject harmful code into the system root path, which would then execute with LocalSystem privileges as the application starts up. This signifies a grave security concern for users utilizing this anti-cheat service.

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Affected Version(s)

Easy Anti-Cheat 4.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47739 - Proof of Concept

References

https://www.exploit-db.com/exploits/49841
exploit
https://www.epicgames.com
product
https://www.easy.ac
product

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LiquidWorm as Gjoko Krstic of Zero Science Lab
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