High CVSS 7.4
CVE-2026-66141
NVD analysis in progress
Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.
What this means
- Exposure
- Exploitable with local access to the machine, without authentication and with no action from the victim. The attack does require particular conditions, which makes it less systematic.
- Impact
- An attacker can read sensitive data, modify or destroy data and take the service offline.
- Weakness
- Code from an untrusted source is loaded and executed.
- Likelihood
- Its EPSS score stays low: nothing points to imminent exploitation, which is no reason to leave it unpatched.
What to doFold into the next patch cycle.
Read automatically from the CVSS vector, the weakness type (CWE) and the EPSS score. The technical description above remains the one published by NIST.