CVE-2021-23758
CISA KEV
ACT NOW
Priority: 0.00
BB Relevance:
0/100
Published: N/A
Modified: N/A
First seen: 2026-10-29
Status: pending_score
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.
CISA Known Exploited Vulnerability
Vendor / Product
Ajax.NET Professional — Ajax.NET Professional
Date Added
2026-08-26
Remediation Due
2026-09-09
This vulnerability affects an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/michaelschwarz/Ajax.NET-Professional/commit/b0e63be5f0bb20dfce507cb8a1a9568f6e73de57 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2021-23758
Weakness Classification (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| ajaxpro.2_project | ajaxpro.2 | * |
| michaelschwarz | ajax.net_professional | < 21.10.30.1 |
References & Advisories (5)
US Government Resource
Third Party Advisory
Patch
Third Party Advisory
Exploit
VDB Entry
Exploit
Third Party Advisory