CISA: Spyware and RATs used to target WhatsApp and Signal Users

Security Affairs

November 25, 2025 at 10:39 AM

Actively Exploited

Summary

CISA has issued a warning regarding the use of commercial spyware and remote access trojans (RATs) targeting users of popular messaging apps like WhatsApp and Signal. This threat highlights the increasing risk to user privacy and security in mobile communications, necessitating heightened vigilance and protective measures.

Original Article Summary

CISA warns that threat actors are actively using commercial spyware and RATs to target users of mobile messaging apps WhatsApp and Signal. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) is warning of threat actors using commercial spyware and remote access trojans (RATs) to target users of popular instant messaging applications, including WhatsApp and Signal. […]

Impact

WhatsApp, Signal

In the Wild

Yes

Timeline

Newly disclosed

Remediation

Users are advised to maintain updated versions of their messaging applications and employ strong security practices, such as enabling two-factor authentication and being cautious of suspicious links and attachments.

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