Microsoft 27 Dec 2025 · 3 min read End of an Era: Microsoft Finally Sets Date to Kill Vulnerable RC4 Cipher After decades of known vulnerabilities, Microsoft confirms it will disable RC4 by default in Active Directory by mid-2026, forcing a global migration to AES encryption. Read more
Microsoft 26 Dec 2025 · 3 min read End of the Line for RC4: Microsoft Sets 2026 Deadline to Kill Vulnerable Encryption Cipher After 26 years, Microsoft is finally retiring the insecure RC4 algorithm from Active Directory to combat Kerberoasting and modernize Windows security. Read more