{"cve":"CVE-2017-7796","nvd":{"published":"2018-06-11T21:29:09.593","modified":"2026-06-17T01:25:12.673","status":"Modified","description":"On Windows systems, the logger run by the Windows updater deletes the file \"update.log\" before it runs in order to write a new log of that name. The path to this file is supplied at the command line to the updater and could be used in concert with another local exploit to delete a different file named \"update.log\" instead of the one intended. Note: This attack only affects Windows operating systems. Other operating systems are not affected. This vulnerability affects Firefox < 55.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","score":4.7},"cwes":["CWE-20"],"references":["http://www.securitytracker.com/id/1039124","https://bugzilla.mozilla.org/show_bug.cgi?id=1234401","https://www.mozilla.org/security/advisories/mfsa2017-18/","http://www.securitytracker.com/id/1039124","https://bugzilla.mozilla.org/show_bug.cgi?id=1234401"],"products":["mozilla:firefox"],"source":"nvd","synced_at":"2026-10-19T20:51:47.459859389+00:00"},"epss":{"cve":"CVE-2017-7796","score":0.00269,"percentile":0.19105,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}