CVE-2026-94056

High CVSS 7.5

Published 2026-09-19 · last changed 2026-09-19

The fix

We hold no Microsoft remediation data for CVE-2026-94056, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory.

Sources

NVD record for CVE-2026-94056

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