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CVE-2017-7766

An attack using manipulation of "updater.ini" contents, used by the Mozilla Windows Updater, and privilege escalation through the Mozilla…

High7.8EPSS 0.37%
Published
Updated
Reserved
Assigned by
mozilla

Description

An attack using manipulation of "updater.ini" contents, used by the Mozilla Windows Updater, and privilege escalation through the Mozilla Maintenance Service to allow for arbitrary file execution and deletion by the Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.

Scores

CVSS scores of CVE-2017-7766, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0High7.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.37% · top 69% of all CVEs (3 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

  • File execution and privilege escalation through updater.ini, Mozilla Windows Updater, and Mozilla Maintenance Service

Affected products

  • Mozilla · Firefox ESR

    • affected unspecified – < 52.2

  • Mozilla · Firefox

    • affected unspecified – < 54

References (5)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .