{"cve":"CVE-2016-2830","nvd":{"published":"2016-08-05T01:59:00.140","modified":"2026-06-17T00:44:32.717","status":"Modified","description":"Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 preserve the network connection used for favicon resource retrieval after the associated browser window is closed, which makes it easier for remote web servers to track users by observing network traffic from multiple IP addresses.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-200"],"references":["http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html","http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html","http://rhn.redhat.com/errata/RHSA-2016-1551.html","http://www.debian.org/security/2016/dsa-3640","http://www.mozilla.org/security/announce/2016/mfsa2016-63.html"],"products":["mozilla:firefox"],"source":"nvd","synced_at":"2026-10-19T20:40:10.783210791+00:00"},"epss":{"cve":"CVE-2016-2830","score":0.01459,"percentile":0.73552,"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."]}