Is CVE-2017-11357 in the CISA KEV catalog?

Yes. CVE-2017-11357 is on the CISA Known Exploited Vulnerabilities list, added 2023-01-26, and has known ransomware campaign use.

What is the CVSS severity of CVE-2017-11357?

CVE-2017-11357 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2017-11357?

CVE-2017-11357 has an EPSS score of 75.71% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-11357?

Upgrade telerik ui for asp.net ajax to 2020.1.114 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2017-11357

CRITICALCISA KEVEPSS 99th pctl

9.8

CVSS v3

NVD

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.

CWE-434Unrestricted File Upload

How to fix

Remediation Available

telerik ui for asp.net ajaxNVD

Affected:< 2020.1.114Fixed in:2020.1.114CVE-2017-11357derived from NVD

ui for asp.net ajaxNVD

Affected:< 2020.1.114Fixed in:2020.1.114CVE-2017-11357derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

75.71%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

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

Telerik UI for ASP.NET AJAX contains an insecure direct object reference vulnerability in RadAsyncUpload that can result in file uploads in a limited location and/or remote code execution.

Apply updates per vendor instructions.

Remediation due: 2023-02-16

Associated with ransomware campaigns

References

Exploit1

exploit-db.com

Vendor Advisory1

telerik.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-434 (Unrestricted File Upload) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-12617	High	8.1	100%	KEV	Fix
CVE-2018-15961	Critical	9.8	100%	KEV	-
CVE-2021-31207	Medium	6.6	100%	KEV + Ransom	Fix
CVE-2017-12615	High	8.1	100%	KEV + Ransom	-
CVE-2025-31324	Critical	10.0	99%	KEV + Ransom	-
CVE-2024-50623	Critical	9.8	99%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-22.