{
    "id": "CVE-2016-5254",
    "published": "2016-08-05 01:59:12",
    "last_modified": "2026-06-17 00:49:03",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-416",
    "description": "Use-after-free vulnerability in the nsXULPopupManager::KeyDown function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by leveraging keyboard access to use the Alt key during selection of top-level menu items.",
    "epss_score": "0.02953",
    "epss_percentile": "0.86811",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-11 18:17:14",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "mozilla",
            "product": "firefox"
        },
        {
            "vendor": "oracle",
            "product": "linux"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "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/mfsa2016-70.html",
        "http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html",
        "http://www.securityfocus.com/bid/92261",
        "http://www.securitytracker.com/id/1036508",
        "http://www.ubuntu.com/usn/USN-3044-1",
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1266963",
        "https://security.gentoo.org/glsa/201701-15",
        "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/mfsa2016-70.html",
        "http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html",
        "http://www.securityfocus.com/bid/92261",
        "http://www.securitytracker.com/id/1036508",
        "http://www.ubuntu.com/usn/USN-3044-1",
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1266963",
        "https://security.gentoo.org/glsa/201701-15"
    ]
}