CVE-2026-94056 — HIGH (7.5)

Vulnerability Description

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.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

LOW

Related Weaknesses (CWE)

CWE-908

References

https://lists.exim.org/lurker/message/20260918.121220.0f87338e.en.html

FAQ

What is CVE-2026-94056?

CVE-2026-94056 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.

How severe is CVE-2026-94056?

CVE-2026-94056 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-94056?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.