CVE-2020-36519

Name: CVE-2020-36519
Creator: NVD / NIST
Published: 2022-03-16T00:15:07.9+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2020-36519 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF. This occurs through misuse of the address rewrite feature. (The domain being spoofed must be a customer in the Mimecast grid from which the spoofing occurs.)

Metrics

CVSS 3.1

4.9/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.80%

52.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mimecast	Email Security	< 2020-01-10

References

https://wesleyk.me/2020/01/10/my-first-vulnerability-mimecast-sender-address-verification/Exploit, Third Party Advisory
https://wesleyk.me/2020/01/10/my-first-vulnerability-mimecast-sender-address-verification/Exploit, Third Party Advisory

Timeline

Published: Mar 16, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-36519?

How severe is CVE-2020-36519?

CVE-2020-36519 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2020-36519?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-36519?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST