onyx

onyx --cves cve-2011-0411

CVE-2011-0411

MEDPOCPostfix
score
<0.1
cvss
6.8
epss
16.3%
published
2011-03-16
kev added
—
first seen

Postfix 2.4.x < 2.4.16, 2.5.x < 2.5.12, 2.6.x < 2.6.9, and 2.7.x < 2.7.3 contain a man-in-the-middle caused by improper I/O buffering restrictions in STARTTLS, letting attackers inject commands into encrypted SMTP sessions, exploit requires MITM position.

Timeline

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

events2011-03-16 — PublishedP2026-10-21 — Tracked by OnyxT2026-10-21 — Public PoCXscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 16.3%2026-09-23: epss 16.3%2026-09-24: epss 16.3%2026-09-25: epss 16.3%2026-09-26: epss 16.3%2026-09-27: epss 16.3%2026-09-28: epss 16.3%2026-09-29: epss 16.3%2026-09-30: epss 16.3%2026-10-01: epss 16.3%2026-10-02: epss 16.3%2026-10-03: epss 16.3%2026-10-04: epss 16.3%2026-10-05: epss 16.3%2026-10-06: epss 16.3%2026-10-07: epss 16.3%2026-10-08: epss 16.3%2026-10-09: epss 16.3%2026-10-10: epss 16.3%2026-10-11: epss 16.3%2026-10-12: epss 16.3%2026-10-13: epss 16.3%2026-10-14: epss 16.3%2026-10-15: epss 16.3%2026-10-16: epss 16.3%2026-10-18: epss 16.3%2026-10-19: epss 16.3%2026-10-20: epss 16.3%2026-10-21: epss 16.3%16.3%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-264

References 24