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CVE-2017-9248: Progress Telerik UI for ASP.NET AJAX and Sitefinity Cryptographic Weakness Vulnerability
Progress ASP.NET AJAX and Sitefinity · in CISA KEV since 2021-11-03
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2021-11-03added to KEV
2022-05-03federal remediation due date
75.10%EPSS exploit probability (30 days) 99.5th percentile
9.8 CRITICALCVSS 3.1
Unknownknown ransomware use
1,584days from NVD publication to KEV
What it is
Progress Telerik UI for ASP.NET AJAX and Sitefinity have a cryptographic weakness in Telerik.Web.UI.dll that can be exploited to disclose encryption keys (Telerik.Web.UI.DialogParametersEncryptionKey and/or the MachineKey), perform cross-site-scripting (XSS) attacks, compromise the ASP.NET ViewState, and/or upload and download files.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-522 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2017-07-03 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2017-9248.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.