CVE-2017-7766 json
An attack using manipulation of "updater.ini" contents, used by the Mozilla Windows Updater, and privilege escalation through the Mozilla M…
published 2018-06-11 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-16741
- cvss
- 7.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Mozilla Firefox ESR 52.2
- Mozilla Firefox 54
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.8 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Mozilla Firefox ESR
- Mozilla Firefox
References
-
mozilla.org
/security/advisories/mfsa2017-15/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=1342742
issue-tracking, vendor-advisory
-
mozilla.org
/security/advisories/mfsa2017-16/
vendor-advisory
-
securityfocus.com
/bid/99057
vdb-entry, third-party-advisory
-
securitytracker.com
/id/1038689
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2017-7766
- NVD CVE-2017-7766
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.