{"cve":"CVE-2012-3966","nvd":{"published":"2012-08-29T10:56:40.723","modified":"2026-06-16T23:44:09.373","status":"Modified","description":"Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a negative height value in a BMP image within a .ICO file, related to (1) improper handling of the transparency bitmask by the nsICODecoder component and (2) improper processing of the alpha channel by the nsBMPDecoder component.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-119"],"references":["http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html","http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html","http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html","http://rhn.redhat.com/errata/RHSA-2012-1210.html","http://rhn.redhat.com/errata/RHSA-2012-1211.html"],"products":["mozilla:firefox","mozilla:seamonkey","mozilla:thunderbird","mozilla:thunderbird_esr"],"source":"nvd","synced_at":"2026-10-19T20:25:53.526315492+00:00"},"epss":{"cve":"CVE-2012-3966","score":0.05194,"percentile":0.92473,"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."]}