CISA KEV · Known exploitedCritical

CVE-2017-11357

Telerik User Interface (UI) for ASP.NET AJAX

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
EPSS
75.7%
99.5% percentile
CISA KEV
Listed
Published
2017.08.24
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability75.7%
Technical severityCVSS 9.8

Vulnerability overview

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.

Affected product and versions

Product
Telerik User Interface (UI) for ASP.NET AJAX
Affected versions
< 2020.1.114
Fixed versions
2020.1.114

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2023.02.16
  1. 1
    Identify

    Confirm that Telerik User Interface (UI) for ASP.NET AJAX and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-20, CWE-434
KEV added
2023.01.26
Ransomware use
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