What is CVE-2020-23679?

CVE-2020-23679 is a critical-severity vulnerability in Linux Network Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-11-03.

How severe is CVE-2020-23679?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Linux Network Project

CVE-2020-23679

Buffer overflow vulnerability in Renleilei1992 Linux_Network_Project 1.0, allows attackers to execute arbitrary code, via the password field.

Vulnerability class: Buffer Overflow

Published 2021-11-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (78.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Linux Network Project — versions 1.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/Renleilei1992/Linux_Network_Project/issues/1 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-23679?: CVE-2020-23679 is a critical-severity vulnerability in Linux Network Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-11-03.
How severe is CVE-2020-23679?: Critical severity. CVSS v3 base score is 9.8 out of 10.