CVE-2019-10149
KEVExim Mail Transfer Agent (MTA) Improper Input Validation
Description
Improper validation of recipient address in deliver_message() function in /src/deliver.c may lead to remote command execution.
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.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HPublishedJun 5, 2019
Last modifiedJun 17, 2026
Added to KEVJan 10, 2022
Remediation dueJul 10, 2022
References
- lists.opensuse.org/opensuse-security-announce/2019-06/msg00020.htmlMailing ListThird Party Advisory
- packetstormsecurity.com/files/153218/Exim-4.9.1-Remote-Command-Execution.htmlExploitThird Party Advisory
- packetstormsecurity.com/files/153312/Exim-4.91-Local-Privilege-Escalation.htmlExploitThird Party Advisory
- packetstormsecurity.com/files/154198/Exim-4.91-Local-Privilege-Escalation.htmlExploitThird Party Advisory
- seclists.org/fulldisclosure/2019/Jun/16Mailing ListThird Party Advisory
- openwall.com/lists/oss-security/2019/06/05/2Mailing ListThird Party Advisory
- openwall.com/lists/oss-security/2019/06/05/3Mailing ListPatch
- openwall.com/lists/oss-security/2019/06/05/4ExploitMailing List
- openwall.com/lists/oss-security/2019/06/06/1ExploitMailing List
- openwall.com/lists/oss-security/2019/07/25/6Mailing ListThird Party Advisory
- openwall.com/lists/oss-security/2019/07/25/7Mailing ListThird Party Advisory
- openwall.com/lists/oss-security/2019/07/26/4Mailing ListThird Party Advisory
0 recent articles mention this CVE
89
Risk assessment · Critical
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1569 days
- CVSS
- 9.8 CRITICAL
- EPSS (30-day exploit probability)
- 100.0% · top 1% of all CVEs
- Weakness
- CWE-78
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.