CVE-2025-6218 in WinRAR
Summary
by MITRE • 06/21/2025
RARLAB WinRAR Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of RARLAB WinRAR. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the handling of file paths within archive files. A crafted file path can cause the process to traverse to unintended directories. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-27198.
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Analysis
by VulDB Data Team • 12/10/2025
The CVE-2025-6218 vulnerability represents a critical directory traversal flaw in RARLAB WinRAR that enables remote code execution through malicious archive files. This vulnerability falls under the CWE-22 category for Path Traversal and aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, specifically targeting the execution of arbitrary code through compromised archive handling processes. The vulnerability exists within WinRAR's archive file path processing mechanism, where maliciously crafted file paths can cause the decompression process to traverse directories beyond the intended extraction location.
The technical implementation of this vulnerability stems from insufficient input validation and path sanitization within WinRAR's archive extraction routines. When processing archive files containing specially crafted file paths, the application fails to properly validate or sanitize directory traversal sequences such as "../" or "..\\" that could redirect the extraction process to write files outside the designated target directory. This flaw allows attackers to bypass normal security boundaries and potentially overwrite system files or inject malicious code into the victim's environment. The vulnerability specifically affects versions of WinRAR that do not properly implement secure path resolution during archive extraction operations.
Operational impact of this vulnerability extends beyond simple code execution to encompass potential system compromise and data exfiltration. An attacker who successfully exploits this vulnerability can execute arbitrary code with the privileges of the current user, potentially leading to full system compromise if the user has administrative privileges. The requirement for user interaction through visiting malicious pages or opening malicious files aligns with ATT&CK technique T1203 for Exploitation for Client Execution, making this vulnerability particularly dangerous in social engineering campaigns. The vulnerability's remote nature means attackers can deliver malicious archives through various vectors including email attachments, compromised websites, or malicious file sharing platforms.
Mitigation strategies for CVE-2025-6218 should include immediate patching of affected WinRAR installations to the latest versions that contain proper path validation and sanitization routines. Organizations should implement comprehensive endpoint protection measures including behavior monitoring for suspicious archive extraction activities and network-based intrusion detection systems that can identify malicious file path patterns. Security awareness training for end users remains crucial to prevent accidental execution of malicious archive files, while application whitelisting policies can help prevent unauthorized execution of potentially malicious code. The vulnerability demonstrates the importance of secure coding practices in archive handling applications and highlights the need for regular security assessments of file processing libraries and utilities that handle untrusted input data.