VULNERABILITY INTELLIGENCE

CVE-2020-8794

CVSS score9.8 CRITICAL
EPSS probability88.90%
CISA KEVNot currently listed
Published2020-02-25
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.

Weakness classification

  • nvd@nist.gov: CWE-125

Primary references