Vuln: CVE-2020-0601 | Detection.FYI

Windows CryptoAPI Spoofing Vulnerability (CVE-2020-0601 - CurveBall)

Sep 19, 2026 · Domain: Endpoint OS: Windows Use Case: Threat Detection Tactic: Defense Evasion Use Case: Vulnerability Data Source: Windows Security Event Logs Resources: Investigation Guide Noise: Low Performance: Normal Threat: Vulnerability Exploit Rule Type: Custom Query (KQL) Platform: Windows Vuln: CVE-2020-0601 ·
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A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates. An attacker could exploit the vulnerability by using a spoofed code-signing certificate to sign a malicious executable, making it appear the file was from a trusted, legitimate source.

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