CVE-2026-94057

SMTP Smuggling Vulnerability in Exim Pre-4.100.1

Published Sep 19, 2026 CVSS 3.1 · 4 Medium EPSS < 1% KEV · Not listed
Description
Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6522-1 exim4 security update
Ubuntu USN Ubuntu USN USN-8834-1 Exim vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title SMTP Smuggling Vulnerability in Exim Pre-4.100.1
Type Values Removed Values Added
Description Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing.
First Time appeared Exim
Exim exim
Weaknesses CWE-93
CPEs cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*
Vendors & Products Exim
Exim exim
References
Metrics cvssV3_1

{'score': 4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 22, 2026, 3:59 PM
Reserved
Sep 19, 2026, 10:54 PM
Status
Analyzed
Published
Sep 19, 2026, 11:17 PM
Modified
Sep 24, 2026, 8:40 PM