M&S Cyberattack 99% loss in revenue

Written by Debra Baker
Published on November 23, 2025

Table of Contents

Explore the implications of the recent cyber attack on Marks & Spencer, uncovering the impact on sales and customer data security.

M&S is projected to claim up to £100 million in losses due to the cyber attack.

Over 18 million customers received notifications about potential data breaches.

The suspension of online shopping has led to an estimated loss of over £70 million in sales.

Discover answers to common questions about the recent cyber attack and its impact on our customers.

The hackers called the M&S IT Help Desk pretending to be actual employees, acting like they forgot their passwords.

Personal customer information was accessed, but no card or payment details or account passwords were compromised.

M&S is working with insurers to cover losses and is advising customers to remain vigilant against potential fraud.

The company is enhancing its cybersecurity measures and working closely with experts to prevent future breaches.

While passwords were not compromised, it is always a good practice to update passwords regularly for enhanced security.

Customers should be cautious of unsolicited communications claiming to be from M&S and verify any suspicious messages.

Criminal activity online – including, but not limited to, ransomware and data extortion – is rampant. Attacks like this are becoming more and more common. And all organisations, of all sizes, need to be prepared

Utilize AI-driven tools to identify and respond to potential threats in real-time, minimizing the risk of data breaches.

Regularly educate staff on cybersecurity best practices to ensure they can recognize and respond to potential threats effectively.

Implement strong encryption methods to protect sensitive customer data both in transit and at rest.

Don’t wait for a cyber attack to compromise your business. Partner with TrustedCISO to fortify your defenses and protect your valuable data. Our expert consultants are ready to assess your current security posture and implement robust strategies tailored to your needs. Contact us now to secure your future.