vulnerability

Debian: CVE-2020-28021: exim4 -- security update

Severity
9
CVSS
(AV:N/AC:L/Au:S/C:C/I:C/A:C)
Published
May 6, 2021
Added
May 6, 2021
Modified
Mar 30, 2026

Description

Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command.

Solution

debian-upgrade-exim4
Title
Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.