Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2017-9248

CVE-2017-9248CRITICAL

n/a n/a — Progress ASP.NET AJAX and Sitefinity

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .7510   99.5   YES

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  May 28  Reserved by mitre
  Jul 3   Published (CNA: mitre)
  Nov 3   Added to CISA KEV, remediation due 2022-05-03

CWE-522 · CNA: mitre · CVSS v3.1 · 5 references · KEV due May 3, 2022

Description

Telerik.Web.UI.dll in Progress Telerik UI for ASP.NET AJAX before R2 2017 SP1 and Sitefinity before 10.0.6412.0 does not properly protect Telerik.Web.UI.DialogParametersEncryptionKey or the MachineKey, which makes it easier for remote attackers to defeat cryptographic protection mechanisms, leading to a MachineKey leak, arbitrary file uploads or downloads, XSS, or ASP.NET ViewState compromise.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 28, 2017	Reserved	Reserved by mitre
July 3, 2017	Published	Published (CNA: mitre)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2022-05-03

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-522

References (5)

http://www.securityfocus.com/bid/99965 [vdb-entry, x_refsource_BID]
http://www.telerik.com/blogs/security-alert-for-telerik-ui-for-asp.net-ajax-and-progress-sitefinity [x_refsource_CONFIRM]
http://www.telerik.com/support/kb/aspnet-ajax/details/cryptographic-weakness [x_refsource_CONFIRM]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-9248 [government-resource]
https://www.exploit-db.com/exploits/43873/ [exploit, x_refsource_EXPLOIT-DB]

Authoritative record: CVE-2017-9248 at cve.org

Weaknesses: CWE-522

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2017-9248 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.