{"version":"https://jsonfeed.org/version/1.1","title":"Patchfirst: Ajax.NET Professional vulnerabilities","home_page_url":"https://patchfirst.co/vendor/ajax-net-professional/","feed_url":"https://patchfirst.co/feed/vendor/ajax-net-professional.json","description":"New and newly exploited Ajax.NET Professional CVEs, with CISA KEV, EPSS and ATT&CK context. Newest 50 by publication or KEV listing.","language":"en-GB","items":[{"id":"CVE-2021-23758#kev","url":"https://patchfirst.co/cve/CVE-2021-23758/","title":"[KEV] CVE-2021-23758: Ajax.NET Professional Deserialization of Untrusted Data Vulnerability","content_text":"Ajax.NET Professional · Ajax.NET Professional. In CISA KEV since 2026-08-26. ENISA EUVD lists it as exploited. EPSS 82.6% (higher than 99.67% of CVEs). CVSS 9.8 CRITICAL. Public exploit code exists. ATT&CK: T1190 Exploit Public-Facing Application; T1059 Command and Scripting Interpreter. Priority 79.8 of 100.","summary":"Ajax.NET Professional Deserialization of Untrusted Data Vulnerability","date_published":"2026-08-26T00:00:00.000Z","date_modified":"2026-08-27T04:16:38.000Z","tags":["kev","public-exploit","T1190","T1059"],"_patchfirst":{"reason":"kev","priority":79.8,"kev":{"dateAdded":"2026-08-26","ransomware":false},"epss":{"score":0.82578,"percentile":0.99665},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1"},"vendor":"Ajax.NET Professional","product":"Ajax.NET Professional","techniqueIds":["T1190","T1059"],"reportCount":0,"hasPublicExploit":true,"euvdExploited":true}}]}