# CVE-2019-10149: Exim Mail Transfer Agent (MTA) Improper Input Validation

> CVE-2019-10149: Exim Mail Transfer Agent (MTA) Improper Input Validation. CVSS 9.0 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2019-10149
Last updated: 2025-10-21T23:45:35Z

- Published: 2019-06-05 00:00 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: redhat
- CVSS: 9.0 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS: 100.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-01-10, federal due date 2022-07-10, ransomware use: Unknown
- CWE: CWE-78

## Description

A flaw was found in Exim versions 4.87 to 4.91 (inclusive). Improper validation of recipient address in deliver\_message() function in /src/deliver.c may lead to remote command execution.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- exim: exim

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-10149)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2019-10149)
- [http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00020.html](http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00020.html)
- [http://packetstormsecurity.com/files/153218/Exim-4.9.1-Remote-Command-Execution.html](http://packetstormsecurity.com/files/153218/Exim-4.9.1-Remote-Command-Execution.html)
- [http://packetstormsecurity.com/files/153312/Exim-4.91-Local-Privilege-Escalation.html](http://packetstormsecurity.com/files/153312/Exim-4.91-Local-Privilege-Escalation.html)
- [http://packetstormsecurity.com/files/154198/Exim-4.91-Local-Privilege-Escalation.html](http://packetstormsecurity.com/files/154198/Exim-4.91-Local-Privilege-Escalation.html)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=CVE-2019-10149](https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10149)
- [http://seclists.org/fulldisclosure/2019/Jun/16](http://seclists.org/fulldisclosure/2019/Jun/16)
- [https://seclists.org/bugtraq/2019/Jun/5](https://seclists.org/bugtraq/2019/Jun/5)
- [https://security.gentoo.org/glsa/201906-01](https://security.gentoo.org/glsa/201906-01)
- [https://usn.ubuntu.com/4010-1/](https://usn.ubuntu.com/4010-1/)
- [https://www.debian.org/security/2019/dsa-4456](https://www.debian.org/security/2019/dsa-4456)
- [https://www.exim.org/static/doc/security/CVE-2019-10149.txt](https://www.exim.org/static/doc/security/CVE-2019-10149.txt)
- [http://www.openwall.com/lists/oss-security/2019/06/05/2](http://www.openwall.com/lists/oss-security/2019/06/05/2)
- [http://www.openwall.com/lists/oss-security/2019/06/05/3](http://www.openwall.com/lists/oss-security/2019/06/05/3)
- [http://www.openwall.com/lists/oss-security/2019/06/05/4](http://www.openwall.com/lists/oss-security/2019/06/05/4)
- [http://www.openwall.com/lists/oss-security/2019/06/06/1](http://www.openwall.com/lists/oss-security/2019/06/06/1)
- [http://www.openwall.com/lists/oss-security/2019/07/25/6](http://www.openwall.com/lists/oss-security/2019/07/25/6)
- [http://www.openwall.com/lists/oss-security/2019/07/25/7](http://www.openwall.com/lists/oss-security/2019/07/25/7)
- [http://www.openwall.com/lists/oss-security/2019/07/26/4](http://www.openwall.com/lists/oss-security/2019/07/26/4)
- [http://www.openwall.com/lists/oss-security/2021/05/04/7](http://www.openwall.com/lists/oss-security/2021/05/04/7)
- [http://www.securityfocus.com/bid/108679](http://www.securityfocus.com/bid/108679)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2019-10149 · Markdown: https://rewindex.com/cve/CVE-2019-10149.md · JSON: https://rewindex.com/api/v1/cves/CVE-2019-10149 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:44:11.464Z