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Vulnerabilities

Vulnerability · CVE-2017-11317

Telerik UI for ASP.NET AJAX Unrestricted File Upload Vulnerability

Published Aug 23, 2017 · catalog updated Jun 16, 2026 · Progress User Interface (UI) for ASP.NET AJAX

Patch now

CVE-2017-11317 is in the CISA known-exploited catalog, due May 2, 2022. Confirm Progress User Interface (UI) for ASP.NET AJAX against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
84.17%
Remediation
Remediation guidance
Affected products
cpe telerik/ui for asp.net ajax · vendor Progress User Interface (UI) for ASP.NET AJAX · vendor Telerik User Interface (UI) for ASP.NET AJAX

Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe telerik/ui for asp.net ajax2017.2.503
  • cpe telerik/ui for asp.net ajax2017.2.621
  • vendor Progress User Interface (UI) for ASP.NET AJAXversion unspecified
  • vendor Telerik User Interface (UI) for ASP.NET AJAXversion unspecified

How to fix CVE-2017-11317

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2017-11317 is in the CISA known-exploited catalog, due May 2, 2022. Confirm Progress User Interface (UI) for ASP.NET AJAX against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with telerik/ui for asp.net ajax 2017.2.503; telerik/ui for asp.net ajax 2017.2.621. Apply updates per vendor instructions.

What should an analyst verify?

CWE-326: Inadequate Encryption Strength. EPSS 84.17%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 23, 2017 · Catalog

    Detected

    Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

  2. Apr 11, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 2, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

Sources

  • CISA KEVConfirmed exploitationCVE-2017-11317

    Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2017-11317

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2017-11317

    30-day exploitation probability 84.2%

    first.org
  • Exploit DatabasePublic exploit reference43874

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_windows/http/telerik_rau_deserialization

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2017-11317

    Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2017-11317

    Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.