onyx

onyx --cves cve-2020-28021

CVE-2020-28021

HIGHExim
score
<0.1
cvss
8.8
epss
4.1%
published
2021-05-06
kev added
—
first seen

Exim 4 < 4.94.2 contains a vulnerability caused by improper neutralization of line delimiters in SMTP AUTH, letting authenticated remote SMTP clients insert newline characters into spool files, potentially leading to remote code execution as root, exploit requires authentication.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2021-05-06 — PublishedP2026-10-21 — Tracked by OnyxTscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 4.1%2026-09-23: epss 4.1%2026-09-24: epss 4.1%2026-09-25: epss 4.1%2026-09-26: epss 4.1%2026-09-27: epss 4.1%2026-09-28: epss 4.1%2026-09-29: epss 4.1%2026-09-30: epss 4.1%2026-10-01: epss 4.1%2026-10-02: epss 4.1%2026-10-03: epss 4.1%2026-10-04: epss 4.1%2026-10-05: epss 4.1%2026-10-06: epss 4.1%2026-10-07: epss 4.1%2026-10-08: epss 4.1%2026-10-09: epss 4.1%2026-10-10: epss 4.1%2026-10-11: epss 4.1%2026-10-12: epss 4.1%2026-10-13: epss 4.1%2026-10-14: epss 4.1%2026-10-15: epss 4.1%2026-10-16: epss 4.1%2026-10-18: epss 4.1%2026-10-19: epss 4.1%2026-10-20: epss 4.1%2026-10-21: epss 4.1%4.1%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx

Weaknesses

NVD-CWE-Other

References 1