Vulnerability in Microsoft Windows
CVE-2020-26966
Searching for a single word from the address bar caused an mDNS request to be sent on the local network searching for a hostname consisting of that string; resulting in an information leak. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.014 (70.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Microsoft Windows
- Mozilla Firefox — versions < 83
- Mozilla Firefox Esr — versions < 78.5
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions < 78.5
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking, Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-50/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-52/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-51/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2020-26966?
- CVE-2020-26966 is a medium-severity vulnerability in Microsoft Windows. CVSS score: 6.5/10. Published 2020-12-09.
- How severe is CVE-2020-26966?
- Medium severity. CVSS v3 base score is 6.5 out of 10.