CVE-2026-94054

Out-of-Bounds Write via Proxy-Protocol in Exim

Published Sep 19, 2026 CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Description
Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.

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 Out-of-Bounds Write via Proxy-Protocol in Exim
Type Values Removed Values Added
Description Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.
First Time appeared Exim
Exim exim
Weaknesses CWE-787
CPEs cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*
Vendors & Products Exim
Exim exim
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 22, 2026, 4:07 PM
Reserved
Sep 19, 2026, 10:46 PM
Status
Analyzed
Published
Sep 19, 2026, 11:17 PM
Modified
Sep 24, 2026, 8:47 PM