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Identity & AccessOct 13, 2026

The MFA Gaps Attackers are Still Exploiting

Attackers exploit MFA gaps, using stolen credentials for VPNs and RDP access.

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Summary

Attackers continue to exploit vulnerabilities in multi-factor authentication (MFA) by using stolen credentials to gain access to systems like VPNs and RDP that still rely solely on passwords. While organizations often secure cloud applications with MFA, internal systems may remain unprotected, creating a significant attack vector. This tactic was demonstrated in an Akira ransomware attack where initial access was gained through an unprotected VPN, leading to data theft.

The lesson from this incident

Full lesson

Organizations frequently deploy MFA for cloud and SaaS applications while leaving critical internal systems like VPNs and RDP protected only by passwords — a dangerous inconsistency attackers actively exploit. The Akira ransomware group demonstrated this gap by gaining initial access through a VPN endpoint with no MFA enforced, enabling credential-based intrusion that led to data theft. This highlights a common misconception that MFA coverage is 'good enough' when only partially deployed. Incomplete security controls create shadow attack surfaces that are just as dangerous as having no controls at all. A consistent, organization-wide MFA policy is essential to closing these gaps before adversaries exploit them.

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Indicators of Compromise

  • malware — Akira

Entities

Microsoft 365 (product)SonicWall SSL VPN (product)RDP (product)Active Directory (technology)Specops Software (vendor)Akira (threat_actor)