CVE-2017-9248

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 75%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
99.5%
KEV
⚠ Exploited

Published

July 3, 2017

Last Modified

April 21, 2026

Advisory Details (4)

Auto-updated Apr 30, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-9248
generic🟡 PoC Available

Telerik UI for ASP.NET AJAX 2012.3.1308 < 2017.1.118 - Encryption Keys Disclosure - ASPX webapps Exploit

https://www.exploit-db.com/exploits/43873/
generic

Security Alert for UI for ASP.NET AJAX and Sitefinity

http://www.telerik.com/blogs/security-alert-for-telerik-ui-for-asp.net-ajax-and-progress-sitefinity
generic
http://www.securityfocus.com/bid/99965

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 50× in last 7d / 210× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 415 total refreshes for this CVE.

  1. 2026-07-22 21:50 UTCEG score recompute
  2. 2026-07-22 21:50 UTCGHSA enrichment
  3. 2026-07-22 19:40 UTCCISA KEV update
  4. 2026-07-22 17:41 UTCEG score recompute
  5. 2026-07-22 17:40 UTCGHSA enrichment
  6. 2026-07-22 14:04 UTCEPSS rescore
  7. 2026-07-22 13:31 UTCGHSA enrichment
  8. 2026-07-22 09:21 UTCGHSA enrichment
  9. 2026-07-22 05:12 UTCGHSA enrichment
  10. 2026-07-22 00:52 UTCGHSA enrichment
  11. 2026-07-21 18:52 UTCGHSA enrichment
  12. 2026-07-21 14:40 UTCGHSA enrichment
  13. 2026-07-21 14:37 UTCCISA KEV update
  14. 2026-07-21 10:31 UTCGHSA enrichment
  15. 2026-07-21 06:21 UTCGHSA enrichment
  16. 2026-07-21 02:12 UTCGHSA enrichment
  17. 2026-07-20 22:01 UTCGHSA enrichment
  18. 2026-07-20 17:52 UTCEG score recompute
  19. 2026-07-20 17:52 UTCGHSA enrichment
  20. 2026-07-20 17:04 UTCEPSS rescore
  21. 2026-07-20 17:04 UTCEPSS rescore
  22. 2026-07-20 13:42 UTCGHSA enrichment
  23. 2026-07-20 09:32 UTCGHSA enrichment
  24. 2026-07-20 05:23 UTCGHSA enrichment
  25. 2026-07-20 01:13 UTCGHSA enrichment
Show 75 more
  1. 2026-07-19 21:03 UTCGHSA enrichment
  2. 2026-07-19 16:54 UTCGHSA enrichment
  3. 2026-07-19 12:45 UTCGHSA enrichment
  4. 2026-07-19 08:35 UTCGHSA enrichment
  5. 2026-07-19 04:25 UTCGHSA enrichment
  6. 2026-07-19 00:15 UTCGHSA enrichment
  7. 2026-07-18 20:05 UTCGHSA enrichment
  8. 2026-07-18 15:56 UTCGHSA enrichment
  9. 2026-07-18 11:46 UTCGHSA enrichment
  10. 2026-07-18 07:37 UTCGHSA enrichment
  11. 2026-07-18 03:28 UTCGHSA enrichment
  12. 2026-07-17 23:19 UTCGHSA enrichment
  13. 2026-07-17 19:10 UTCGHSA enrichment
  14. 2026-07-17 15:00 UTCGHSA enrichment
  15. 2026-07-17 10:50 UTCEG score recompute
  16. 2026-07-17 10:50 UTCGHSA enrichment
  17. 2026-07-17 06:40 UTCGHSA enrichment
  18. 2026-07-17 02:31 UTCGHSA enrichment
  19. 2026-07-16 22:20 UTCGHSA enrichment
  20. 2026-07-16 18:09 UTCGHSA enrichment
  21. 2026-07-16 17:04 UTCCISA KEV update
  22. 2026-07-16 13:56 UTCGHSA enrichment
  23. 2026-07-16 09:46 UTCGHSA enrichment
  24. 2026-07-16 05:36 UTCGHSA enrichment
  25. 2026-07-16 01:27 UTCGHSA enrichment
  26. 2026-07-15 21:17 UTCGHSA enrichment
  27. 2026-07-15 17:08 UTCGHSA enrichment
  28. 2026-07-15 16:55 UTCEPSS rescore
  29. 2026-07-15 16:54 UTCEPSS rescore
  30. 2026-07-15 16:49 UTCCISA KEV update
  31. 2026-07-15 15:04 UTCCISA KEV update
  32. 2026-07-15 12:58 UTCGHSA enrichment
  33. 2026-07-15 08:47 UTCGHSA enrichment
  34. 2026-07-15 04:37 UTCGHSA enrichment
  35. 2026-07-15 00:25 UTCGHSA enrichment
  36. 2026-07-14 20:15 UTCGHSA enrichment
  37. 2026-07-14 18:05 UTCCISA KEV update
  38. 2026-07-14 16:06 UTCGHSA enrichment
  39. 2026-07-14 11:54 UTCGHSA enrichment
  40. 2026-07-14 07:44 UTCGHSA enrichment
  41. 2026-07-14 03:33 UTCGHSA enrichment
  42. 2026-07-13 23:24 UTCGHSA enrichment
  43. 2026-07-13 19:15 UTCGHSA enrichment
  44. 2026-07-13 17:07 UTCCISA KEV update
  45. 2026-07-13 15:05 UTCGHSA enrichment
  46. 2026-07-13 10:55 UTCGHSA enrichment
  47. 2026-07-13 06:46 UTCGHSA enrichment
  48. 2026-07-13 02:36 UTCGHSA enrichment
  49. 2026-07-12 22:27 UTCGHSA enrichment
  50. 2026-07-12 18:17 UTCGHSA enrichment
  51. 2026-07-12 14:07 UTCGHSA enrichment
  52. 2026-07-12 09:58 UTCGHSA enrichment
  53. 2026-07-12 05:48 UTCGHSA enrichment
  54. 2026-07-12 05:43 UTCEPSS rescore
  55. 2026-07-12 01:39 UTCGHSA enrichment
  56. 2026-07-11 21:29 UTCGHSA enrichment
  57. 2026-07-11 17:19 UTCGHSA enrichment
  58. 2026-07-11 13:09 UTCGHSA enrichment
  59. 2026-07-11 09:00 UTCGHSA enrichment
  60. 2026-07-11 04:51 UTCGHSA enrichment
  61. 2026-07-11 00:41 UTCGHSA enrichment
  62. 2026-07-10 20:32 UTCGHSA enrichment
  63. 2026-07-10 17:52 UTCCISA KEV update
  64. 2026-07-10 16:22 UTCGHSA enrichment
  65. 2026-07-10 12:13 UTCGHSA enrichment
  66. 2026-07-10 08:04 UTCGHSA enrichment
  67. 2026-07-10 03:54 UTCGHSA enrichment
  68. 2026-07-09 23:45 UTCGHSA enrichment
  69. 2026-07-09 19:36 UTCGHSA enrichment
  70. 2026-07-09 19:06 UTCEPSS rescore
  71. 2026-07-09 15:26 UTCGHSA enrichment
  72. 2026-07-09 11:16 UTCGHSA enrichment
  73. 2026-07-09 07:04 UTCGHSA enrichment
  74. 2026-07-09 02:55 UTCGHSA enrichment
  75. 2026-07-08 22:45 UTCGHSA enrichment

Publicly available exploits

(5 references)

Working exploit code is in the public domain (4 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoC0xsharz/telerik-scanner-cve-2017-9248
    First seen May 28, 2025

    Telerik CVE-2017-9248 Vulnerability Scanner

    Open source ↗
  • GitHub PoCblacklanternsecurity/dp_cryptomg
    First seen Oct 4, 2022

    Another tool for exploiting CVE-2017-9248, a cryptographic weakness in Telerik UI for ASP.NET AJAX dialog handler.

    Open source ↗
  • GitHub PoCcapt-meelo/Telewreck
    First seen Aug 3, 2018

    A Burp extension to detect and exploit versions of Telerik Web UI vulnerable to CVE-2017-9248.

    Open source ↗
  • Exploit-DBEDB-43873
    First seen Jan 24, 2018

    Telerik UI for ASP.NET AJAX 2012.3.1308 < 2017.1.118 - Encryption Keys Disclosure

    Open source ↗
  • GitHub PoCbao7uo/dp_crypto
    First seen Jan 16, 2018

    Base64-based encryption oracle exploit for CVE-2017-9248 (Telerik UI for ASP.NET AJAX dialog handler)

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2017-9248?
CVE-2017-9248 is a critical vulnerability published on July 3, 2017. 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…
When was CVE-2017-9248 disclosed?
CVE-2017-9248 was first published in the National Vulnerability Database on July 3, 2017, with the most recent update on April 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-9248 actively exploited?
Yes. CISA added CVE-2017-9248 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Progress ASP.NET AJAX and Sitefinity. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2017-9248?
CVE-2017-9248 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2017-9248?
CVE-2017-9248 affects Progress ASP.NET AJAX and Sitefinity. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2017-9248?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-9248, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2017-9248

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