CVE-2020-6795

Name: CVE-2020-6795
Creator: NVD / NIST
Published: 2020-03-02T05:15:12.353+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.27%

Last modified Jun 17, 2026

CVE-2020-6795 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash. This vulnerability affects Thunderbird < 68.5.. EPSS estimates a 1.27% chance of exploitation in the next 30 days.

Description

When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash. This vulnerability affects Thunderbird < 68.5.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.27%

66.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Mozilla	Thunderbird	< 68.5.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1611105Permissions Required
https://security.gentoo.org/glsa/202003-10
https://usn.ubuntu.com/4328-1/
https://usn.ubuntu.com/4335-1/
https://www.mozilla.org/security/advisories/mfsa2020-07/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1611105Permissions Required
https://security.gentoo.org/glsa/202003-10
https://usn.ubuntu.com/4328-1/
https://usn.ubuntu.com/4335-1/
https://www.mozilla.org/security/advisories/mfsa2020-07/Vendor Advisory

Timeline

Published: Mar 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6795?

How severe is CVE-2020-6795?

CVE-2020-6795 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.27% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6795?

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-2020-6795?

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

Scan your code now

Source: NVD / NIST