{
    "id": "CVE-2019-18935",
    "published": "2019-12-11 13:15:11",
    "last_modified": "2026-06-17 02:25:36",
    "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-502",
    "description": "Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)",
    "epss_score": "0.99737",
    "epss_percentile": "0.99953",
    "kev": 1,
    "kev_due": "2022-05-03",
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:25:09",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-05-03."
    },
    "products": [
        {
            "vendor": "telerik",
            "product": "ui_for_asp.net_ajax"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2019-18935",
        "date_added": "2021-11-03",
        "due_date": "2022-05-03",
        "vendor": "Progress",
        "product": "Telerik UI for ASP.NET AJAX",
        "name": "Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability",
        "ransomware": 1
    },
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "47793",
            "title": "Telerik UI - Remote Code Execution via Insecure Deserialization",
            "date": "2019-12-18",
            "url": "https://www.exploit-db.com/exploits/47793"
        }
    ],
    "refs_list": [
        "http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html",
        "http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html",
        "https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html",
        "https://github.com/bao7uo/RAU_crypto",
        "https://github.com/noperator/CVE-2019-18935",
        "https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui",
        "https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/",
        "https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization",
        "https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29",
        "https://www.telerik.com/support/whats-new/release-history",
        "http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html",
        "http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html",
        "https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html",
        "https://github.com/bao7uo/RAU_crypto",
        "https://github.com/noperator/CVE-2019-18935",
        "https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui",
        "https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/",
        "https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization",
        "https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29",
        "https://www.telerik.com/support/whats-new/release-history",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18935"
    ]
}