DSA-6400-1 exim4 - security update
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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Details
Original advisory: https://lists.debian.org/debian-security-announce/2026/msg00311.html
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-661400.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all scored CVEs.
- Low exploitation riskCVE-2026-661410.10% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-66140 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-66141 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
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