CVE-2017-16943

PoC ×2—

CVSS 3.0

9.8 critical

EPSS

47%p99

Published

Nov 25, 2017 (Nov 25, 2017)

Modified

Jun 17, 2026

Description

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.

Vendors: exim debian
Products: exim, debian linux
Weakness: CWE-416
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (46.7%)

In the news3 stories

New Exim BDAT Vulnerability Exposes GnuTLS Builds to Potential Code Execution

The Hacker NewsMay 15, 00:00 UTC · May 15, 2026Vulnerability CVE-2026-45185 CVE-2017-16943

Exim Internet Mailer Found Vulnerable to RCE And DoS Bugs; Patch Now

The Hacker NewsNov 27, 11:13 UTC · Nov 27, 2017Vulnerability CVE-2017-16943 CVE-2017-16944

Unix mailer Exim is affected by RCE, DoS vulnerabilities. Apply the workaround asap

Security AffairsNov 27, 10:37 UTC · Nov 27, 2017Vulnerability CVE-2017-16943 CVE-2017-16944