VulnerabilityAnalyzed
CVE-2026-66141
Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.
HIGH 7.8EPSS 0.10%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.10%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.10% probability · 1th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-829
- Affected
- exim/exim
- Source
- cve@mitre.org
References
- https://openwall.com/lists/oss-security/2026/07/22/9Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.