Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

CRITICAL

9.8 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

93.66 %

Predictive Probability

Percentile Rank

99.8 th

Documented as more likely to be exploited than 99.8% of known CVEs.

Detection Date

Nov 03, 2021

Remediation Due

May 03, 2022

CISA Catalog Active

Threat Analysis

Progress Telerik UI for ASP.NET AJAX contains a deserialization of untrusted data vulnerability through RadAsyncUpload which leads to code execution on the server in the context of the w3wp.exe process.

Remediation Directive

Apply updates per vendor instructions.

Asset Context

Vendor Identity

Progress

Affected Product

Telerik UI for ASP.NET AJAX

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-502

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2019-18935