{
  "id": "CVE-2019-18935",
  "url": "https://spydr.io/cve/CVE-2019-18935",
  "published": "2019-12-11T13:15:11.767Z",
  "modified": "2026-06-17T02:25:36.353Z",
  "score": 9.8,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.99737,
  "epss_percentile": 0.99953,
  "exploited": true,
  "kev": {
    "added": "2021-11-03",
    "due": "2022-05-03",
    "action": "Apply updates per vendor instructions.",
    "ransomware": "Known",
    "name": "Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability",
    "notes": "https://nvd.nist.gov/vuln/detail/CVE-2019-18935"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "telerik"
  ],
  "products": [
    "telerik ui for asp.net ajax"
  ],
  "cwes": [
    "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.)",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html",
      "tags": [
        "Not Applicable"
      ]
    },
    {
      "url": "https://github.com/bao7uo/RAU_crypto",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/noperator/CVE-2019-18935",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/",
      "tags": [
        "Press/Media Coverage"
      ]
    },
    {
      "url": "https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://www.telerik.com/support/whats-new/release-history",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18935",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2019-18935",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}