{
    "id": "CVE-2021-22992",
    "published": "2021-03-31 17:15:13",
    "last_modified": "2026-06-17 03:38:10",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-120",
    "description": "On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, a malicious HTTP response to an Advanced WAF/BIG-IP ASM virtual server with Login Page configured in its policy may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may allow remote code execution (RCE), leading to complete system compromise. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.",
    "epss_score": "0.72711",
    "epss_percentile": "0.99431",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:48:28",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 72.7% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "f5",
            "product": "big-ip_access_policy_manager"
        },
        {
            "vendor": "f5",
            "product": "big-ip_advanced_firewall_manager"
        },
        {
            "vendor": "f5",
            "product": "big-ip_advanced_web_application_firewall"
        },
        {
            "vendor": "f5",
            "product": "big-ip_analytics"
        },
        {
            "vendor": "f5",
            "product": "big-ip_application_acceleration_manager"
        },
        {
            "vendor": "f5",
            "product": "big-ip_application_security_manager"
        },
        {
            "vendor": "f5",
            "product": "big-ip_ddos_hybrid_defender"
        },
        {
            "vendor": "f5",
            "product": "big-ip_domain_name_system"
        },
        {
            "vendor": "f5",
            "product": "big-ip_fraud_protection_service"
        },
        {
            "vendor": "f5",
            "product": "big-ip_global_traffic_manager"
        },
        {
            "vendor": "f5",
            "product": "big-ip_link_controller"
        },
        {
            "vendor": "f5",
            "product": "big-ip_local_traffic_manager"
        },
        {
            "vendor": "f5",
            "product": "big-ip_policy_enforcement_manager"
        },
        {
            "vendor": "f5",
            "product": "ssl_orchestrator"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://support.f5.com/csp/article/K52510511",
        "https://support.f5.com/csp/article/K52510511"
    ]
}