CVE-2021-4127

Public Exploit

Description

An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited. This vulnerability affects Thunderbird < 78.9 and Firefox ESR < 78.9.

9.8

CVSS

Severity: Critical

CVSS 3.1 •

EPSS 0.24%

Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Thunderbird

Affected: Mozilla Firefox ESR

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2021-12/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2021-11/	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1691547	issue tracking patch vendor advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-4127?: CVE-2021-4127 has been scored as a critical severity vulnerability.
How to fix CVE-2021-4127?: To fix CVE-2021-4127, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4127 being actively exploited in the wild?: It is possible that CVE-2021-4127 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4127?: CVE-2021-4127 affects Mozilla Thunderbird, Mozilla Firefox ESR.

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