CVE-2020-7247Actively exploitedAdded to KEV 2022-03-25

OpenSMTPD Remote Code Execution Vulnerability

OpenBSD, OpenSMTPD

Description

smtp_mailaddr in smtp_session.c in OpenSMTPD, as used in OpenBSD and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session.

CVSS severity for this advisory hasn't been enriched from NVD yet, check back shortly.

EPSS, exploit probability

Critical

99.0%

estimated chance of real-world exploitation in the next 30 days, higher than 99.9% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2022-04-15

CWE-755 CWE-78

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