High [CVE-2026-66140] Privilege escalation via directory traversal due to mishandled queue-name arguments
This high-severity Red Hat Linux advisory covers CVE-2026-66140.
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Summary
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. A flaw was found in Exim.
This Important flaw in Exim allows a local, unprivileged attacker to achieve privilege escalation through directory traversal. By exploiting mishandled queue-name arguments, an attacker can access sensitive files outside the intended spool area, increasing the risk of system compromise.
Red Hat severity: Important — CVSS 8.4 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-22.
- < 4.99.5
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
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