CVE-2021-23758CISA KEVEPSS p99.7%

CVE-2021-23758Ajax.NET Professional Deserialization of Untrusted Data Vulnerability

Ajax.NET Professional / Ajax.NET Professional

Description

Ajax.NET Professional (AjaxPro) contains a deserialization of untrusted data vulnerability that could allow for remote code execution via arbitrary .NET classes. The impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.

Scoring

CVSS 8.1 ()
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS82.58% probability of exploitation · percentile 99.7% · 2026-10-05T12:00:23Z
Last modified2026-08-27

CISA KEV entry

Added to KEV: 2026-08-26

Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.