CVE-2018-6789

high KEV
Published 2021-11-03 · Modified 2021-11-03
CVSS v3
CVSS v2
VIR risk
9.5

Description

Exim contains a buffer overflow vulnerability in the base64d function part of the SMTP listener that may allow for remote code execution.

CISA KEV

Vendor
Exim
Product
Exim
Due date
2022-05-03

Predictions

Exploit likelihood
99%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: cisa-kev — https://nvd.nist.gov/vuln/detail/CVE-2018-6789

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-6789

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201802-6

Exploits

OS impact

OSVersionStatusFixed in
arch archfixed4.90.1-1
debian debianbookwormfixed4.90.1-1
debian debianbullseyefixed4.90.1-1
debian debianforkyfixed4.90.1-1
debian debiansidfixed4.90.1-1
debian debiantrixiefixed4.90.1-1

References

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