India’s cyber security agency,
CERT-In, has issued a
high-severity warning for whatsapp users after discovering a critical vulnerability that could allow hackers to
steal sensitive data.The flaw, identified as
CVE-2025-55177, affects
WhatsApp on iOS and Mac devices, putting millions of users at risk if they do not update to the latest version. Here’s what you need to know to stay safe.
1. What Is the Threat?
The vulnerability is linked to
WhatsApp’s linked-device sync system, where errors in
authorization processing can be exploited.Hackers can send
malicious links to targeted users.Once clicked, these links may
silently grant attackers access to:Private conversationsStored media (photos, videos)Personal files and dataCERT-In also revealed that in some cases, this flaw has been
combined with another iOS vulnerability (CVE-2025-43300) to create more sophisticated attacks, making it harder for victims to detect unauthorized access.
2. Who Is Most at Risk?
The advisory highlights specific
versions of WhatsApp that are vulnerable:
WhatsApp for iOS: Versions older than 2.25.21.73
WhatsApp business for iOS: Version 2.25.21.78
WhatsApp for Mac: Version 2.25.21.78Users running these versions should
update immediately to avoid potential cyberattacks.
3. How to Stay Safe
The indian government has outlined several
precautionary measures to protect whatsapp accounts:
Update Immediately
Install the
latest whatsapp version from the App Store, which includes a
security patch addressing this flaw.
Enable Auto-Update
Turn on
automatic updates to ensure your device always runs the most secure version of the app.
Avoid Suspicious Links
Do not click on links from
unknown or untrusted sources, as these could be phishing attempts exploiting the vulnerability.
Check Linked Devices
Regularly review and
manage devices linked to your whatsapp account to ensure there is
no unauthorized access.
4. Why This Alert Is Serious
WhatsApp has
over 400 million active users in India.The vulnerability threatens
personal privacy as well as
business communications, since many businesses use whatsapp to interact with customers.Security experts warn that hackers are increasingly using
combined flaws in apps and operating systems to launch more powerful attacks.This alert highlights the
growing sophistication of cyber threats and underscores the importance of
timely updates and caution online.
5. Final Advice
CERT-In emphadata-sizes that
prevention is the best defense. By updating whatsapp and practicing
safe online habits, users can significantly reduce their risk of cyberattacks.Always keep your app and
operating system updated.Avoid clicking on
unknown links.Regularly monitor
linked devices for suspicious activity.Staying alert and proactive is crucial. Every whatsapp user, whether for
personal or business use, should
update immediately and remain cautious to protect sensitive information.