{
    "id": "CVE-2020-12856",
    "published": "2020-05-18 04:15:09",
    "last_modified": "2026-06-17 02:52:26",
    "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": null,
    "description": "OpenTrace, as used in COVIDSafe through v1.0.17, TraceTogether, ABTraceTogether, and other applications on iOS and Android, allows remote attackers to conduct long-term re-identification attacks and possibly have unspecified other impact, because of how Bluetooth is used.",
    "epss_score": "0.05142",
    "epss_percentile": "0.92188",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-07 18:17:22",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "alberta",
            "product": "abtracetogether"
        },
        {
            "vendor": "health",
            "product": "covidsafe"
        },
        {
            "vendor": "tracetogether",
            "product": "tracetogether"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://covidsafe.watch/issue-register/cve-2020-12856-long-term-tracking-and-possibly-enables-other-bluetooth-based-attack-vectors",
        "https://docs.google.com/document/d/1u5a5ersKBH6eG362atALrzuXo3zuZ70qrGomWVEC27U/edit?usp=sharing",
        "https://github.com/alwentiu/COVIDSafe-CVE-2020-12856/blob/master/README.md",
        "https://covidsafe.watch/issue-register/cve-2020-12856-long-term-tracking-and-possibly-enables-other-bluetooth-based-attack-vectors",
        "https://docs.google.com/document/d/1u5a5ersKBH6eG362atALrzuXo3zuZ70qrGomWVEC27U/edit?usp=sharing",
        "https://github.com/alwentiu/COVIDSafe-CVE-2020-12856/blob/master/README.md"
    ]
}