Kaspersky ID:
Detect Date:


Multiple vulnerabilities were found in Mozilla Thunderbird. Malicious users can exploit these vulnerabilities to execute arbitrary code, spoof user interface, bypass security restrictions, gain privileges.

Below is a complete list of vulnerabilities:

  1. Security UI vulnerability in eval() function can be exploited to spoof user interface and execute arbitrary code.
  2. Use After Free vulnerability on Windows can be exploited to execute arbitrary code.
  3. Elevation of privilege vulnerability on Windows can be exploited to bypass security restrictions, gain privileges and execute arbitrary code.

Original advisories

Related products

CVE list

  • CVE-2020-15663
  • CVE-2020-15664
  • CVE-2020-15669

Read more

Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com

Found an inaccuracy in the description of this vulnerability? Let us know!
Kaspersky Next
Let’s go Next: redefine your business’s cybersecurity
Learn more
New Kaspersky!
Your digital life deserves complete protection!
Learn more
Confirm changes?
Your message has been sent successfully.