Progress ASP.NET AJAX and Sitefinity
YES - ON THE CISA KEV LIST
CVE-2017-9248
Progress Telerik UI for ASP.NET AJAX and Sitefinity Cryptographic Weakness Vulnerability
overdue since 2022-05-03
Progress: 9 entries (0.5% of all KEV entries are from this vendor); 1 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
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.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2017-9248
References
Other KEV entries for this vendor: Progress
- CVE-2026-8037 - LoadMaster (2026-08-07)
- CVE-2024-4885 - WhatsUp Gold (2025-03-03)
- CVE-2024-1212 - Kemp LoadMaster (2024-11-18)
- CVE-2024-6670 - WhatsUp Gold (2024-09-16)
- CVE-2024-4358 - Telerik Report Server (2024-06-13)
- CVE-2023-40044 - WS_FTP Server (2023-10-05)
- CVE-2023-34362 - MOVEit Transfer (2023-06-02)
- CVE-2019-18935 - Telerik UI for ASP.NET AJAX (2021-11-03)
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