CVE-2020-11806

Name: CVE-2020-11806
Creator: NVD / NIST
Published: 2020-04-23T15:15:14.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.49%

Last modified Jun 17, 2026

CVE-2020-11806 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. In MailStore Outlook Add-in (and Email Archive Outlook Add-in) through 12.1.2, the login process does not validate the validity of the certificate presented by the server.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

In MailStore Outlook Add-in (and Email Archive Outlook Add-in) through 12.1.2, the login process does not validate the validity of the certificate presented by the server.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

0.49%

38.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Mailstore	Mailstore Server	<= 12.1.2

References

https://help.mailstore.com/security/MAILSTORE-SA-2020-01.txtVendor Advisory
https://help.mailstore.com/security/MAILSTORE-SA-2020-01.txtVendor Advisory

Timeline

Published: Apr 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11806?

In MailStore Outlook Add-in (and Email Archive Outlook Add-in) through 12.1.2, the login process does not validate the validity of the certificate presented by the server.

How severe is CVE-2020-11806?

CVE-2020-11806 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11806?

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-2020-11806?

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

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Source: NVD / NIST