CVE-2021-4070: v2fly v2ray-Core

Critical severity, CVSS 9.1. EPSS: 0.9% chance of exploitation in the next 30 days.

Off-by-one Error in GitHub repository v2fly/v2ray-core prior to 4.44.0.

Affected products

• v2fly v2ray-Core: before 4.44.0 (fixed in 4.44.0)

Published 2022-02-23. Last modified 2026-06-17.