Security readout for executives and security teams
CVE-2017-7766 is a Windows-only Mozilla Firefox updater flaw. A local attacker could manipulate updater configuration used by the Mozilla Maintenance Service, which runs with elevated privileges, to execute or delete files. It affects Firefox before 54 and Firefox ESR before 52.2. Exposure is most likely on legacy Windows endpoints running Firefox below 54 or Firefox ESR below 52.2, especially where Mozilla Maintenance Service remains installed. Modern, patched, or non-Windows deployments are not indicated as affected by the provided sources. Treat this as a cleanup and hardening priority for legacy Windows browser estates. It is not documented here as actively exploited, but affected systems can turn local access into privileged file execution or deletion. Mitigation focus: Upgrade affected Windows Firefox installations to Firefox 54, Firefox ESR 52.2, or later supported releases.; Prioritize devices where users have local login access and Mozilla Maintenance Service is installed.; Remove or isolate obsolete Firefox versions that cannot be upgraded promptly..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Privilege behavior lookup
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Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-7766 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.mozilla.org/security/advisories/mfsa2017-15/CVE reference · x_refsource_CONFIRM
- https://bugzilla.mozilla.org/show_bug.cgi?id=1342742CVE reference · x_refsource_CONFIRM
- https://www.mozilla.org/security/advisories/mfsa2017-16/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
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