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Actively exploited vulnerability

RARLAB WinRAR: file access flaw under attack

CVE-2025-6218 · RARLAB WinRAR Path Traversal Vulnerability

Concerns everyone who uses it7.8 high

What is affected

RARLAB WinRAR is found on ordinary personal computers and phones, so this is not only a problem for companies. If you use it and have not updated since the fix was released, you are exposed.

RARLAB WinRAR contains a path traversal vulnerability allowing an attacker to execute code in the context of the current user.

CISA's description

What an attacker can do

This is a file access flaw. It lets an attacker read or write files they should never reach, such as configuration files that hold passwords, or upload a malicious file that the system then runs.

How it is reached
Needs access to the device or a file opened on it
Access the attacker needs
No account needed
Does the victim have to do something?
Yes, the victim must open or click something

What to do

  1. Update RARLAB WinRAR now. Open the update or "About" screen, install whatever is offered and restart the app or device, because the fix is not active until you do.
  2. Turn on automatic updates so the next fix arrives without you having to look for it.
  3. If your device is too old to receive this update, stop using the affected app for anything sensitive and plan a replacement.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Action required by CISA for US federal agencies

Vendor advisories and fixes

  • win-rar.comwww.win-rar.com/singlenewsview.html?&L=0&tx_ttnews%5Btt_news%5D=276&cHash=b5165454d983fc97

How urgent is it

CISA added this vulnerability to its Known Exploited Vulnerabilities catalogue on December 9, 2025, which means there is reliable evidence of attacks in the wild. US federal agencies must fix it by December 30, 2025, a deadline that has already passed. That deadline does not bind anyone else, but it shows how seriously the agency rates it.

The EPSS model estimates a 90% probability that this flaw will be exploited somewhere in the next 30 days. That is higher than 99.8% of all scored vulnerabilities.

Its CVSS severity score is 7.8 out of 10 (high), as recorded in the US National Vulnerability Database.

Technical description

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.

NIST National Vulnerability Database
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