onyx

onyx --cves cve-2020-28018

CVE-2020-28018

CRITPOCExim
score
<0.1
cvss
9.8
epss
56.5%
published
2021-05-06
kev added
—
first seen

Exim 4 < 4.94.2 contains a use after free caused by smtp_reset in certain situations, potentially affecting builds with OpenSSL, letting attackers cause crashes or arbitrary code execution, exploit requires specific build conditions.

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 OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 56.8%2026-09-23: epss 56.8%2026-09-24: epss 56.8%2026-09-25: epss 56.8%2026-09-26: epss 56.8%2026-09-27: epss 56.8%2026-09-28: epss 56.8%2026-09-29: epss 56.8%2026-09-30: epss 56.8%2026-10-01: epss 56.8%2026-10-02: epss 56.8%2026-10-03: epss 56.8%2026-10-04: epss 56.8%2026-10-05: epss 56.8%2026-10-06: epss 56.8%2026-10-07: epss 56.8%2026-10-08: epss 56.5%2026-10-09: epss 56.5%2026-10-10: epss 56.5%2026-10-11: epss 56.5%2026-10-12: epss 56.5%2026-10-13: epss 56.5%2026-10-14: epss 56.5%2026-10-15: epss 56.5%2026-10-16: epss 56.5%2026-10-18: epss 56.5%2026-10-19: epss 56.5%2026-10-20: epss 56.5%2026-10-21: epss 56.5%56.5%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx
  3. Public PoC

Exploit availability

Public PoC flagged by vulnx; no direct exploit link among the citations.

Weaknesses

CWE-416

References 8