CVE-2010-4344

9.8 criticalKEVEPSS 72%

Critical (9.8) in Exim Exim. In CISA KEV since 2022-03-25. EPSS 72% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 72% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CISA KEV: listed 2022-03-25, due 2022-04-15
CWE: CWE-787
Published: 2010-12-14
Modified: 2026-06-16
Record from: the NVD, synced 2026-10-19

Affected

canonical:ubuntu_linux
debian:debian_linux
exim:exim
opensuse:opensuse

References

ftp://ftp.exim.org/pub/exim/ChangeLogs/ChangeLog-4.70
http://atmail.com/blog/2010/atmail-6204-now-available/
http://bugs.exim.org/show_bug.cgi?id=787
http://git.exim.org/exim.git/commit/24c929a27415c7cfc7126c47e4cad39acf3efa6b
http://lists.exim.org/lurker/message/20101210.164935.385e04d0.en.html

Check your stack JSON