What is CVE-2021-4070?

CVE-2021-4070 is a critical-severity vulnerability in V2fly V2fly/v2ray-Core, classified under Off-by-one Error. CVSS score: 9.1/10. Published 2022-02-23.

How severe is CVE-2021-4070?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in V2fly V2fly/v2ray-Core

CVE-2021-4070

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

EPSS: 0.009 (54.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

V2fly V2fly/v2ray-core — versions unspecified
V2fly V2ray-core

Weakness classification (CWE)

CWE-193 — Off-by-one Error

References

security@huntr.dev (x_refsource_CONFIRM, Exploit, Patch, Third Party Advisory)
security@huntr.dev (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-4070?: CVE-2021-4070 is a critical-severity vulnerability in V2fly V2fly/v2ray-Core, classified under Off-by-one Error. CVSS score: 9.1/10. Published 2022-02-23.
How severe is CVE-2021-4070?: Critical severity. CVSS v3 base score is 9.1 out of 10.