CVE-2026-94054 — HIGH (7.0)

Vulnerability Description

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.

CVSS Score

7.0

HIGH

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

HIGH

Availability

LOW

Related Weaknesses (CWE)

CWE-787

References

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

FAQ

What is CVE-2026-94054?

CVE-2026-94054 is a vulnerability with a CVSS score of 7.0 (HIGH). Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.

How severe is CVE-2026-94054?

CVE-2026-94054 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-94054?

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