1621058650.vac May 2026

If the file is located in a /temp/ or /cache/ directory and the timestamp (May 2021) is years in the past, it is almost certainly a stale artifact. However, if this file is in a production environment associated with security software (like Kaspersky), moving it to a "quarantine" folder for 48 hours before deletion is the safest path. Final Thoughts

Associated with Varnish Configuration (VCL) or shared memory logs. 1621058650.vac

The number 1621058650 is a classic Unix timestamp. It translates to Friday, May 14, 2021, at 11:24:10 PM UTC . This tells us exactly when the file was generated. If the file is located in a /temp/