📰IT News: Microsoft's Passkey Vulnerabilities

A security researcher has recently disclosed flaws affecting Microsoft's passkey implementations across Entra ID and Windows 11. If successfully exploited, these weaknesses could have allowed attackers to gain unauthorised access to accounts using techniques traditionally associated with password-based attacks. Further technical details are expected to be presented at the upcoming Black Hat USA 2026 conference.

While this may seem concerning, phishing-resistant authentication remains one of the strongest defences against credential theft. The findings relate to weaknesses in the surrounding architecture and implementation, rather than the phishing-resistant authentication standards themselves.

The key takeaway is that no security control is infallible. Even the strongest technologies rely on secure architecture, correct configuration, and ongoing validation to deliver their intended protection.

Organisations should therefore continually assess and validate their security controls, not only within their own environments but also across the third-party platforms and services they rely upon.