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HIGH · 7.4

CVE-2026-66141

Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.

Vulnerability Description

Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.

CVSS Score

7.4

HIGH

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
EximExim< 4.99.5

Related Weaknesses (CWE)

CWE-829

References

FAQ

What is CVE-2026-66141?

CVE-2026-66141 is a vulnerability with a CVSS score of 7.4 (HIGH). Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.

How severe is CVE-2026-66141?

CVE-2026-66141 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-66141?

Check the references section above for vendor advisories and patch information. Affected products include: Exim Exim.