CVE-2025-21299

Summary

CVE-2025-21299 is a recently disclosed vulnerability that affects the Windows Kerberos authentication protocol. This security flaw permits an attacker to bypass Kerberos security features, potentially gaining unauthorized access to sensitive data or systems. The vulnerability arises due to an issue in the way Windows handles certain authentication requests, allowing an adversary to manipulate the response and evade security checks. Mitigation includes applying Microsoft's recommended patch and implementing strong password policies, as well as enabling multi-factor authentication where possible. Failure to address this vulnerability may result in significant data breaches or unauthorized system access.

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