Mandiant Releases Rainbow Tables Enabling NTLMv1 Admin Password Hacking

Cybersecuritynews •Guru Baran • January 18, 2026

Google-owned Mandiant has publicly released a comprehensive dataset of Net-NTLMv1 rainbow tables, marking a significant escalation in demonstrating the security risks of legacy authentication protocols. The release underscores an urgent message: organizations must immediately migrate away from Net-NTLMv1, a deprecated protocol that has been cryptographically broken since 1999 and widely known to be insecure since […]

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Mandiant Releases NTLMv1 Rainbow Tables for Admin Password Cracking Mandiant has publicly released a dataset of Net-NTLMv1 rainbow tables, highlighting the vulnerabilities of the deprecated NTLMv1 authentication protocol. This release affects organizations still using NTLMv1, which has been known to be insecure since 1999. The dataset enables the cracking of NTLMv1 admin passwords, urging immediate migration to more secure authentication methods. 2 sources 25

Extracted Entities

Tools (1)

Rainbow Tables