CVE-2020-28020

high

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

8.0

Description

Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction.

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-2020-28020

OS impact

OS	Version	Status	Fixed in
arch		fixed	`4.92-1`
debian	bookworm	fixed	`4.92~RC5-1`
debian	bullseye	fixed	`4.92~RC5-1`
debian	forky	fixed	`4.92~RC5-1`
debian	sid	fixed	`4.92~RC5-1`
debian	trixie	fixed	`4.92~RC5-1`

References

https://security-tracker.debian.org/tracker/CVE-2020-28020

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