A AegiFlow
UNKNOWNKNOWN EXPLOITED

CVE-2020-0601

Microsoft Windows CryptoAPI Spoofing Vulnerability

Published
2021-11-03
Modified
2026-07-31
Sources
cisa-kev

Summary

Microsoft Windows CryptoAPI (Crypt32.dll) contains a spoofing vulnerability in the way it 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. A successful exploit could also allow the attacker to conduct man-in-the-middle attacks and decrypt confidential information on user connections to the affected software. The vulnerability is also known under the moniker of CurveBall.

References

Includes data from the CISA Known Exploited Vulnerabilities catalog.

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