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Vulnerability details: VCID-urpr-qse2-7kcf
Vulnerability ID VCID-urpr-qse2-7kcf
Aliases CVE-2020-26966
Summary 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.*
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
System Score Found at
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-26966.json
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
epss 0.00444 https://api.first.org/data/v1/epss?cve=CVE-2020-26966
cvssv3.1 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-50
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-51
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-52
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-26966.json
https://api.first.org/data/v1/epss?cve=CVE-2020-26966
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1898740 https://bugzilla.redhat.com/show_bug.cgi?id=1898740
mfsa2020-50 https://www.mozilla.org/en-US/security/advisories/mfsa2020-50
mfsa2020-51 https://www.mozilla.org/en-US/security/advisories/mfsa2020-51
mfsa2020-52 https://www.mozilla.org/en-US/security/advisories/mfsa2020-52
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-26966.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.633
EPSS Score 0.00444
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:17:06.678036+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-51.yml 38.0.0