CVE-2026-66141
exim4: Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.
CVE-2026-66141 is fixed in 6 products on 1 platform, first by exim4 4.99.1-1ubuntu1.4, released July 23, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0014
3rd percentile
Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| exim4 · Debian 13.5 (trixie) | 4.98.2-1+deb13u4 | DEBIAN-CVE-2026-66141 | Jul 25, 2026 |
| exim4 · Debian 14 | 4.99.4-2 | DEBIAN-CVE-2026-66141 | Jul 25, 2026 |
| exim4 · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.11 | exim4 4.95-4ubuntu2.11 | Jul 31, 2026 |
| exim4 · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.7 | exim4 4.97-4ubuntu4.7 | Jul 31, 2026 |
| exim4 · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.4 | exim4 4.99.1-1ubuntu1.4 | Jul 23, 2026 |
| exim4-base · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.11 | exim4-base 4.95-4ubuntu2.11 | Jul 31, 2026 |
| exim4-base · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.7 | exim4-base 4.97-4ubuntu4.7 | Jul 31, 2026 |
| exim4-base · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.4 | exim4-base 4.99.1-1ubuntu1.4 | Jul 23, 2026 |
| exim4-config · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.11 | exim4-config 4.95-4ubuntu2.11 | Jul 31, 2026 |
| exim4-config · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.7 | exim4-config 4.97-4ubuntu4.7 | Jul 31, 2026 |
| exim4-config · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.4 | exim4-config 4.99.1-1ubuntu1.4 | Jul 23, 2026 |
| exim4-daemon-heavy · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.11 | exim4-daemon-heavy 4.95-4ubuntu2.11 | Jul 31, 2026 |
| exim4-daemon-heavy · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.7 | exim4-daemon-heavy 4.97-4ubuntu4.7 | Jul 31, 2026 |
| exim4-daemon-heavy · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.4 | exim4-daemon-heavy 4.99.1-1ubuntu1.4 | Jul 23, 2026 |
| exim4-daemon-light · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.11 | exim4-daemon-light 4.95-4ubuntu2.11 | Jul 31, 2026 |
| exim4-daemon-light · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.7 | exim4-daemon-light 4.97-4ubuntu4.7 | Jul 31, 2026 |
| exim4-daemon-light · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.4 | exim4-daemon-light 4.99.1-1ubuntu1.4 | Jul 23, 2026 |
| eximon4 · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.11 | eximon4 4.95-4ubuntu2.11 | Jul 31, 2026 |
| eximon4 · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.7 | eximon4 4.97-4ubuntu4.7 | Jul 31, 2026 |
| eximon4 · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.4 | eximon4 4.99.1-1ubuntu1.4 | Jul 23, 2026 |
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