onyx

onyx --cves cve-2005-0021

CVE-2005-0021

HIGHPOCExim
score
<0.1
cvss
7.2
epss
2.6%
published
2005-05-02
kev added
—
first seen

Exim before 4.43 contains multiple buffer overflows caused by handling IPv6 addresses with more than 8 components and DNS PTR lookups, letting attackers execute arbitrary code, exploit requires sending crafted IPv6 addresses or DNS queries.

Timeline

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

events2005-05-02 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 2.6%2026-09-23: epss 2.6%2026-09-24: epss 2.6%2026-09-25: epss 2.6%2026-09-26: epss 2.6%2026-09-27: epss 2.6%2026-09-28: epss 2.6%2026-09-29: epss 2.6%2026-09-30: epss 2.6%2026-10-01: epss 2.6%2026-10-02: epss 2.6%2026-10-03: epss 2.6%2026-10-04: epss 2.6%2026-10-05: epss 2.6%2026-10-06: epss 2.6%2026-10-07: epss 2.6%2026-10-08: epss 2.6%2026-10-09: epss 2.6%2026-10-10: epss 2.6%2026-10-11: epss 2.6%2026-10-12: epss 2.6%2026-10-13: epss 2.6%2026-10-14: epss 2.6%2026-10-15: epss 2.6%2026-10-16: epss 2.6%2026-10-18: epss 2.6%2026-10-19: epss 2.6%2026-10-20: epss 2.6%2026-10-21: epss 2.6%2.6%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

NVD-CWE-Other

References 10