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WinRAR had over 500 million users when the bug was found. ✅ How to Stay Safe Update WinRAR: Ensure you are using version 5.70 or newer .

No complex exploit was needed; the Windows Startup folder handled the execution.

This vulnerability allowed attackers to execute code remotely by simply having a user extract a specially crafted archive. 🛡️ The Vulnerability: CVE-2018-20250 22793.rar

The file is an ACE archive renamed with a .rar extension to trick the user.

WinRAR failed to properly sanitize these paths, allowing the file to be written outside the intended extraction folder. ⚠️ Security Implications WinRAR had over 500 million users when the bug was found

RARLAB removed unacev2.dll entirely to fix the issue.

The file is a well-known proof-of-concept (PoC) archive used to demonstrate a critical vulnerability in WinRAR (tracked as CVE-2018-20250 ). ⚠️ Security Implications RARLAB removed unacev2

The archive contains a file with a relative path like C:\Users\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\exploit.exe .

 
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22793.rar May 2026

WinRAR had over 500 million users when the bug was found. ✅ How to Stay Safe Update WinRAR: Ensure you are using version 5.70 or newer .

No complex exploit was needed; the Windows Startup folder handled the execution.

This vulnerability allowed attackers to execute code remotely by simply having a user extract a specially crafted archive. 🛡️ The Vulnerability: CVE-2018-20250

The file is an ACE archive renamed with a .rar extension to trick the user.

WinRAR failed to properly sanitize these paths, allowing the file to be written outside the intended extraction folder. ⚠️ Security Implications

RARLAB removed unacev2.dll entirely to fix the issue.

The file is a well-known proof-of-concept (PoC) archive used to demonstrate a critical vulnerability in WinRAR (tracked as CVE-2018-20250 ).

The archive contains a file with a relative path like C:\Users\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\exploit.exe .

 

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