CVE-2020-26978

MediumCVSS 6.1/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected software

VendorProductVersions
MozillaFirefox>= unspecified, < 84
MozillaThunderbird>= unspecified, < 78.6
MozillaFirefox ESR>= unspecified, < 78.6

References

Timeline

Published
Jan 7, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2020-26978: Medium severity, CVSS 6.1 | Vulnix