— Topic
Kerberos
2 briefings
Microsoft
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.
Dec 27, 2025
3 min read
Microsoft
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.
Dec 26, 2025
3 min read