CVE-2019-25677 Win-Rar CVE debrief

Who should care

Users of WinRAR 5.61, security teams, and system administrators should be aware of this vulnerability and take steps to mitigate it. This may involve updating to a newer version of WinRAR or taking other compensating controls to prevent local attackers from exploiting this vulnerability.

Technical summary

The vulnerability is caused by the application's failure to properly validate the winrar.lng language file. When a malformed language file is placed in the installation directory, the application will crash when an archive is opened and the test button is pressed. This is due to an access violation at memory address 004F1DB8 when the application attempts to read invalid data. The vulnerability affects WinRAR 5.61 and may allow local attackers to crash the application.

Defensive priority

Medium

Recommended defensive actions

• Update to a newer version of WinRAR if available
• Verify the integrity of the winrar.lng language file
• Restrict access to the installation directory
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-04-05T21:16:45.800Z and has not been modified since then. The NVD entry is currently Analyzed. This information is based on the CVE.org and NVD sources. The vulnerability affects WinRAR 5.61 and may allow local attackers to crash the application. Evidence of exploitation is not publicly available, but defenders should verify the integrity of the winrar.lng language file and monitor for suspicious activity.

Official resources