CVE-2020-28020

score

<0.1

cvss

9.8

epss

7.9%

published

2021-05-06

kev added

—

first seen

2026-10-21

Exim 4 < 4.92 contains an integer overflow caused by mishandling of continuation lines during header-length restriction, letting unauthenticated remote attackers execute arbitrary code, exploit requires sending crafted email headers.