PatchSiren

PatchSiren cyber security CVE debrief

CVE-2017-11317 Telerik CVE debrief

CVE-2017-11317 is a CISA Known Exploited Vulnerabilities (KEV) entry for Telerik UI for ASP.NET AJAX. CISA describes it as an unrestricted file upload vulnerability and directs affected users to apply updates per vendor instructions. Because it is listed in the KEV catalog, defenders should treat exposed Telerik UI for ASP.NET AJAX deployments as a priority for inventory, patching, and validation.

Vendor
Telerik
Product
User Interface (UI) for ASP.NET AJAX
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-04-11
Original CVE updated
2022-04-11
Advisory published
2022-04-11
Advisory updated
2022-04-11

Who should care

Security and application teams responsible for servers running Telerik UI for ASP.NET AJAX, especially internet-facing applications and legacy web estates that may still include the component.

Technical summary

The public source corpus identifies this issue as an unrestricted file upload vulnerability in Telerik UI for ASP.NET AJAX. The supplied sources do not include deeper technical detail, exploit mechanics, or confirmed impact statements beyond the vulnerability name and KEV listing. The most important operational fact is that CISA marked it as known exploited and assigned a remediation due date in the KEV catalog.

Defensive priority

High. CISA’s KEV listing means this vulnerability should be prioritized for rapid assessment and remediation in any environment where the product is present.

Recommended defensive actions

  • Inventory all applications and servers using Telerik UI for ASP.NET AJAX.
  • Apply vendor-provided updates and follow vendor remediation guidance as soon as possible.
  • Verify whether any exposed upload functionality is reachable from untrusted users and restrict it where possible.
  • Review file upload handling, storage paths, and server-side permissions for unexpected write access.
  • Look for suspicious uploaded files, unusual web content, and any signs of tampering in application directories.
  • If patching cannot be completed immediately, reduce exposure by limiting network access to affected applications and monitoring them closely.

Evidence notes

The debrief is based only on the supplied CISA KEV source item and the official record links. The source item identifies the product as Telerik UI for ASP.NET AJAX, the issue as an unrestricted file upload vulnerability, and the remediation as applying updates per vendor instructions. The timeline supplied with the prompt places the KEV addition date at 2022-04-11 and the due date at 2022-05-02. No exploit code, exploitation details, or severity score were provided in the corpus.

Official resources

CISA KEV entry. The supplied timeline shows the vulnerability was added to the KEV catalog on 2022-04-11 with a due date of 2022-05-02. Known ransomware campaign use is listed as unknown in the provided source metadata.