CVE-2020-26978

Description

Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

6.1

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.18%

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

Affected: Mozilla Firefox

Affected: Mozilla Thunderbird

Affected: Mozilla Firefox ESR

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2020-54/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-56/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-55/	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1677047	permissions required

Frequently Asked Questions

What is the severity of CVE-2020-26978?: CVE-2020-26978 has been scored as a medium severity vulnerability.
How to fix CVE-2020-26978?: To fix CVE-2020-26978, 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-2020-26978 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2020-26978 is being actively exploited. 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-2020-26978?: CVE-2020-26978 affects Mozilla Firefox, Mozilla Thunderbird, Mozilla Firefox ESR.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.