Weekly cybersecurity bulletin: the 5 most relevant news (21—24 October 2025)

Like every Friday, we select the key news that has marked the cybersecurity sector this week. Global incidents, new vulnerabilities and the central role of artificial intelligence are at the center of the digital landscape.

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1. Jaguar Land Rover: Record economic impact

Reactions continue to the devastating cyber attack on Jaguar Land Rover. The updated figures place the losses of the company and the United Kingdom at more than 2.5 billion dollars. The case is confirmed as the most costly incident in British history, causing layoffs and paralysis in the international supplier network.

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2. Critical vulnerability exploited in Microsoft SharePoint: objective, critical infrastructures

During the week, threat groups have begun to actively exploit a zero-day vulnerability (CVE-2025-53770) in SharePoint, allowing remote code execution in high-profile companies and agencies (including US nuclear weapons agencies). It is recommended to urgently review patches and configurations in enterprise environments.

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3. New wave of ransomware, with 33 victims in the last 48 hours

Ransomware continues to grow in critical sectors. More than 33 new victims have been identified this week, with targeted attacks on hospitals, manufacturing and ICT. Double extortion ransomware and massive breaches keep the entire industry on alert and reinforce the urgency of having secure backups and contingency simulations.

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4. Malware and advanced campaigns via artificial intelligence

The use of AI by cyberattackers to automate and sophisticated social engineering campaigns is documented. Personalized phishing emails and “intelligent” malware that evades antivirus and EDR are protagonists in today's cyber war. Experts stress the need to integrate defensive AI into corporate strategies.

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5. End of support for Windows 10: Operational and regulatory risk

As of October 14, the most used system in the world stopped receiving security updates. The end of support exposes companies and users to vulnerabilities, sanctions and attacks, urging the migration to Windows 11 and the isolation of legacy equipment in corporate networks.

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