Is CVE-2026-66140 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-66140?

CVE-2026-66140 has a CVSS v3 severity of HIGH (8.4).

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CVE-2026-66140

Description

Exim before 4.99.5 allows directory traversal to access files outside of the spool area, and consequently gain privileges, because arguments related to queue-name are mishandled.