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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 t...
CISA lists CVE-2021-23758 as known exploited in the wild for Ajax.NET Professional Ajax.NET Professional. Ransomware campaign use: Unknown. Federal remediation due date: 2026-09-09.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.