# CVE-2026-94057: exim4: Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead... CVE-2026-94057 is fixed in 17 products on 1 platform, first by exim4 4.99.1-1ubuntu1.5, released September 19, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-94057 - Priority: Routine - CVSS: 5.3 (medium) - EPSS: 0.0020 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 19, 2026 ## Description Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | exim Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-clamav Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-debuginfo Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-debugsource Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-greylist Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-mon Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-mon-debuginfo Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-mysql Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-mysql-debuginfo Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-pgsql Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim-pgsql-debuginfo Fedora 43 | 4.100.1-1.fc43 | [FEDORA-2026-D202B74C6A](https://patchblox.com/security/data/fix/linux/fedora-2026-d202b74c6a.md) | Oct 6, 2026 | | Linux | exim4 Debian 13.5 (trixie) | 4.98.2-1+deb13u5 | [DEBIAN-CVE-2026-94057](https://patchblox.com/security/data/fix/linux/debian-cve-2026-94057.md) | Sep 25, 2026 | | Linux | exim4 Debian 14 | 4.100.1-1 | [DEBIAN-CVE-2026-94057](https://patchblox.com/security/data/fix/linux/debian-cve-2026-94057.md) | Sep 25, 2026 | | Linux | exim4 Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | [exim4 4.95-4ubuntu2.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-exim4-4.95-4ubuntu2.12.md) | Sep 29, 2026 | | Linux | exim4 Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | [exim4 4.97-4ubuntu4.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-exim4-4.97-4ubuntu4.8.md) | Sep 29, 2026 | | Linux | exim4 Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | [exim4 4.99.1-1ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-exim4-4.99.1-1ubuntu1.5.md) | Sep 19, 2026 | | Linux | exim4-base Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | [exim4-base 4.95-4ubuntu2.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-exim4-base-4.95-4ubuntu2.12.md) | Sep 29, 2026 | | Linux | exim4-base Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | [exim4-base 4.97-4ubuntu4.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-exim4-base-4.97-4ubuntu4.8.md) | Sep 29, 2026 | | Linux | exim4-base Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | [exim4-base 4.99.1-1ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-exim4-base-4.99.1-1ubuntu1.5.md) | Sep 19, 2026 | | Linux | exim4-config Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | [exim4-config 4.95-4ubuntu2.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-exim4-config-4.95-4ubuntu2.12.md) | Sep 29, 2026 | | Linux | exim4-config Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | [exim4-config 4.97-4ubuntu4.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-exim4-config-4.97-4ubuntu4.8.md) | Sep 29, 2026 | | Linux | exim4-config Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | [exim4-config 4.99.1-1ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-exim4-config-4.99.1-1ubuntu1.5.md) | Sep 19, 2026 | | Linux | exim4-daemon-heavy Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | [exim4-daemon-heavy 4.95-4ubuntu2.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-exim4-daemon-heavy-4.95-4ubuntu2.12.md) | Sep 29, 2026 | | Linux | exim4-daemon-heavy Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | [exim4-daemon-heavy 4.97-4ubuntu4.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-exim4-daemon-heavy-4.97-4ubuntu4.8.md) | Sep 29, 2026 | | Linux | exim4-daemon-heavy Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | [exim4-daemon-heavy 4.99.1-1ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-exim4-daemon-heavy-4.99.1-1ubuntu1.5.md) | Sep 19, 2026 | | Linux | exim4-daemon-light Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | [exim4-daemon-light 4.95-4ubuntu2.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-exim4-daemon-light-4.95-4ubuntu2.12.md) | Sep 29, 2026 | | Linux | exim4-daemon-light Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | [exim4-daemon-light 4.97-4ubuntu4.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-exim4-daemon-light-4.97-4ubuntu4.8.md) | Sep 29, 2026 | | Linux | exim4-daemon-light Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | [exim4-daemon-light 4.99.1-1ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-exim4-daemon-light-4.99.1-1ubuntu1.5.md) | Sep 19, 2026 | | Linux | eximon4 Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | [eximon4 4.95-4ubuntu2.12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-eximon4-4.95-4ubuntu2.12.md) | Sep 29, 2026 | | Linux | eximon4 Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | [eximon4 4.97-4ubuntu4.8](https://patchblox.com/security/data/fix/linux/ubuntu-noble-eximon4-4.97-4ubuntu4.8.md) | Sep 29, 2026 | | Linux | eximon4 Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | [eximon4 4.99.1-1ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-eximon4-4.99.1-1ubuntu1.5.md) | Sep 19, 2026 | --- Data as of 2026-11-09T01:18:40Z UTC. 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