What is CVE-2021-46671?

CVE-2021-46671 is a medium-severity vulnerability in Atftp Project, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2022-02-04.

How severe is CVE-2021-46671?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Out-of-bounds Read in Atftp Project

CVE-2021-46671

options.c in atftp before 0.7.5 reads past the end of an array, and consequently discloses server-side /etc/group data to a remote client.

Vulnerability class: Buffer Overflow

Published 2022-02-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.013 (68.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.013 · change: -0.001

Affected products

Atftp Project
Debian Linux — versions 9.0, 10.0, 11.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

sourceforge.net/p/atftp/code/ci/9cf799c40738722001552618518279e9f0ef62e5 (Patch, Third Party Advisory)
bugs.debian.org/1004974 (Exploit, Mailing List, Third Party Advisory, Issue Tracking)
lists.debian.org/debian-lts-announce/2022/05/msg00040.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-46671?: CVE-2021-46671 is a medium-severity vulnerability in Atftp Project, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2022-02-04.
How severe is CVE-2021-46671?: Medium severity. CVSS v3 base score is 5.3 out of 10.