Active Directory Under Siege: Why Critical Infrastructure Needs Stronger Security

Active Directory remains the authentication backbone for over 90% of Fortune 1000 companies, with its growing use in hybrid and cloud environments increasing both its value and its attack surface. The article explains that once adversaries compromise AD, they gain privileged access to create accounts, modify permissions, disable security controls and move laterally, often without triggering alerts.

It highlights common techniques such as Golden ticket attacks, DCSync attacks and Kerberoasting, which allow attackers to obtain full domain access or password hashes. In hybrid environments, attackers exploit complexity and synchronization mechanisms, with OAuth token compromises providing backdoor access to on‑premises resources, while legacy NTLM protocols remain a risk.

The piece cites Verizon's Data Breach Investigation Report, noting that compromised credentials are involved in 88% of breaches, and references an April 2025 critical AD flaw that enabled privilege escalation, for which Microsoft released a patch. It also emphasises that effective AD security requires continuous monitoring, patch management and privileged access governance to reduce the attack surface. according to Verizon's Data Breach Investigation Report