For years, enabling Multi-Factor Authentication (MFA) has been a cornerstone of account and device security. While MFA remains essential, the threat landscape has evolved, making some older methods less effective.

The most common form of MFA, four- or six-digit codes sent via SMS, is convenient and familiar, and it’s certainly better than relying on passwords alone. However, SMS is an outdated technology, and cybercriminals have developed reliable ways to bypass it. For organisations handling sensitive data, SMS-based MFA is no longer sufficient. It’s time to adopt the next generation of phishing-resistant MFA to stay ahead of today’s attackers.

SMS was never intended to serve as a secure authentication channel. Its reliance on cellular networks exposes it to security flaws, particularly in telecommunication protocols such as Signaling System No. 7 (SS7), used for communication between networks.

Attackers know that many businesses still use SMS for MFA, which makes them appealing targets. For instance, hackers can exploit SS7 vulnerabilities to intercept text messages without touching your phone. Techniques such as eavesdropping, message redirection, and message injection can be carried out within the carrier network or during over-the-air transmission.

SMS codes are also vulnerable to phishing. If a user enters their username, password, and SMS code on a fake login page, attackers can capture all three in real time and immediately gain access the legitimate account.

The modern office extends far beyond traditional cubicles or open-plan spaces. Since the concept of remote work became popularised in the COVID and post-COVID era, employees now find themselves working from their homes, libraries, bustling coffee shops, and even vacation destinations. These environments, often called “third places,” offer flexibility and convenience but can also introduce risks to company IT systems.

With remote work now a permanent reality, businesses must adapt their security policies accordingly. A coffee shop cannot be treated like a secure office, as its open environment exposes different types of threats. Employees need clear guidance on how to stay safe and protect company data.

Neglecting security on public Wi-Fi can have serious consequences, as hackers often target these locations to exploit remote workers. Equip your team with the right knowledge and tools, and enforce a robust external network security policy to keep company data safe.