CVE-2017-11357Progress 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 c…
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It affects progress telerik_ui_for_asp.net_ajax. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 26, 2023; federal agencies had to remediate by Feb 16, 2023, and it is known to be used in ransomware. Treat that date as your deadline.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-434
- Known exploited
- Added to CISA KEV Jan 26, 2023; federal remediation due Feb 16, 2023; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 77.68% (percentile 100)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
progress telerik_ui_for_asp.net_ajax progress:telerik_ui_for_asp.net_ajax | before 2020.1.114 | NVD |
References
- https://www.exploit-db.com/exploits/43874/exploit, x-refsource-exploit-db, third-party-advisory, vdb-entry
- http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/insecure-direct-object-referencex-refsource-confirm, mitigation, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11357us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.