The Mozilla Maintenance Service "helper.exe" application creates a temporary directory writable by non-privileged users. When this is combined with creation of a junction (a form of symbolic link), protected files in the target directory of the junction can be deleted by the Mozilla 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.
History

Tue, 25 Nov 2025 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Vendors & Products Mozilla firefox Esr

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2018-06-11T21:00:00

Updated: 2024-08-05T16:12:28.276Z

Reserved: 2017-04-12T00:00:00

Link: CVE-2017-7761

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-06-11T21:29:08.297

Modified: 2025-11-25T17:50:16.803

Link: CVE-2017-7761

cve-icon Redhat

No data.