{
    "id": "CVE-2021-21148",
    "published": "2021-02-09 16:15:12",
    "last_modified": "2026-06-17 03:34:54",
    "cvss_score": "8.8",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
    "cwe": "CWE-787",
    "description": "Heap buffer overflow in V8 in Google Chrome prior to 88.0.4324.150 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.",
    "epss_score": "0.19968",
    "epss_percentile": "0.97353",
    "kev": 1,
    "kev_due": "2021-11-17",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:26:59",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2021-11-17."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "google",
            "product": "chrome"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-21148",
        "date_added": "2021-11-03",
        "due_date": "2021-11-17",
        "vendor": "Google",
        "product": "Chromium V8",
        "name": "Google Chromium V8 Heap Buffer Overflow Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "http://packetstormsecurity.com/files/162579/Chrome-Array-Transfer-Bypass.html",
        "https://chromereleases.googleblog.com/2021/02/stable-channel-update-for-desktop_4.html",
        "https://crbug.com/1170176",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7ACWYJ74Z3YN2XH4QMUEGNBC3VXX464L/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUQSMNV7INLDDSD3RKI5S5EAULX2QC7P/",
        "https://security.gentoo.org/glsa/202104-08",
        "https://www.debian.org/security/2021/dsa-4858",
        "http://packetstormsecurity.com/files/162579/Chrome-Array-Transfer-Bypass.html",
        "https://chromereleases.googleblog.com/2021/02/stable-channel-update-for-desktop_4.html",
        "https://crbug.com/1170176",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7ACWYJ74Z3YN2XH4QMUEGNBC3VXX464L/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUQSMNV7INLDDSD3RKI5S5EAULX2QC7P/",
        "https://security.gentoo.org/glsa/202104-08",
        "https://www.debian.org/security/2021/dsa-4858",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21148"
    ]
}