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IMMUNITYSEC

CVE-2019-18935

9.8
CRITICAL
CVSS 3.1
EPSS 99.7% · 100th pctCISA KEV · Exploited in the wild
2019-12-11Updated 2025-10-21KEV 2021-11-03
CISA Known Exploited Vulnerabilities

Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV
2021-11-03
Remediation due
2022-05-03
Ransomware
Known use

Required action
Apply updates per vendor instructions.

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

Description

Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)

Severity

CVSS 3.1 · CISA9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC · CISA-ADP
Exploitationactive
Automatableyes
Technical impacttotal

Exploitation Context

as of October 15, 2026
All KEV statistics→
  • CISA added CVE-2019-18935 to the KEV catalog 693 days after its CVE record was published.
  • It is one of 9 Progress entries in the CISA KEV catalog, and one of 2 added in 2021.
  • Its current EPSS score (99.7%) is higher than that of 90% of CISA KEV entries.

Affected Products

ProductAffected versions
-
n/a

References

10 Links
Other references

Record Details

Published
2019-12-11
Last updated
2025-10-21
Assigner (CNA)
mitre
Credited to
-

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.