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CVE-2017-11357

9.8, critical Known exploited Used in ransomware

Telerik UI for ASP.NET AJAX Insecure Direct Object Reference Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
78% higher than 99.5% of scored CVEs
Exploitation
Confirmed in the wild
Published
23 Aug 20179 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 26 Jan 2023 and links it to ransomware activity. US federal agencies had to remediate by 16 Feb 2023, a deadline that has passed.

Required action. Apply updates per vendor instructions.

Description

Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 does not properly restrict user input to RadAsyncUpload, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

Details

Vendor
Telerik
Product
Telerik Ui For Asp.net Ajax
Weakness
CWE-434 (opens in a new tab)
Status
Analyzed
Updated
14 Aug 2026
Assigner
cve@mitre.org

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References 3

Exploit code 1

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Telerik CVEs

Every Telerik CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2017-11317 Telerik UI for ASP.NET AJAX Unrestricted File Upload Vulnerability KEV EPSS 84% 9.8, critical

Beyond this page

Is CVE-2017-11357 in your network?

This page tells you how dangerous CVE-2017-11357 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2017-11357 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2017-11357 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.