CVE-2026-66140
Two vulnerabilities were discovered in Exim, a mail transport agent, which may result in privilege escalation for a local attacker. https://security-tracker.debian.org/tracker/DSA-6400-1
CSIRTS triage
- What
- Two vulnerabilities in Exim may result in privilege escalation for a local attacker.
- Who is affected
- Local attackers on systems running Exim.
- Urgency
- Remediation is urgent due to the potential for local privilege escalation.
- Action
- Apply the security update provided in DSA-6400-1.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.
Advisory coverage (2)
- highCVE-2026-66140: Exim before 4.99.5 allows directory traversal to access files outside of the spool area, and c…nvd · 2026-07-24
- unknownDSA-6400-1 exim4 - security updatedebian · 2026-07-24
External references
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