CVE-2020-28026

high

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

8.0

Description

Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters, relevant in non-default configurations that enable Delivery Status Notification (DSN). Certain uses of ORCPT= can place a newline into a spool header file, and indirectly allow unauthenticated remote attackers to execute arbitrary commands as root.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-28026

OS impact

OS	Version	Status	Fixed in
arch		fixed	`4.94.2-1`
debian	bookworm	fixed	`4.94.2-1`
debian	bullseye	fixed	`4.94.2-1`
debian	forky	fixed	`4.94.2-1`
debian	sid	fixed	`4.94.2-1`
debian	trixie	fixed	`4.94.2-1`

References

https://security-tracker.debian.org/tracker/CVE-2020-28026

Verify integrity in audit chain (admin only). AS-IS.