CERT-In Issues High Alert for Microsoft Edge Security Flaws

Urgent CERT-In Alert: Microsoft Edge Faces High-Risk Security Flaws Update Now!

The Indian government’s cybersecurity watchdog, CERT-In, has issued a high-severity warning for all Microsoft Edge users in India. Multiple critical vulnerabilities have been discovered in the Chromium-based Edge browser that could allow hackers to take full control of your system. If you’re using any version before 129.0.2792.52, your device is at immediate risk.

This Microsoft Edge security alert comes at a time when the browser is pushing AI-powered features like Copilot agents, which require deep system access. A single malicious webpage could trigger data theft, ransomware deployment, or complete system compromise. CERT-In warns that both personal and business users are equally vulnerable.

What Are the Microsoft Edge Vulnerabilities?

CERT-In has documented over a dozen serious flaws in the Microsoft Edge Stable Channel. These include heap buffer overflows, use-after-free errors, out-of-bounds memory access, and type confusion in V8 engine the same core used by Google Chrome. Each flaw is exploitable remotely without user interaction beyond visiting a booby-trapped site.

The most dangerous issues affect the Omnibox (address bar), Extensions system, Autofill, and App-Bound Encryption. A hacker could bypass security policies, inject malicious code, or escalate privileges to install spyware. The use-after-free in Ozone and race condition in Storage can crash the browser and execute arbitrary code with system-level permissions.

Unlike minor bugs, these vulnerabilities have a CVSS score of 8.8/10 classified as High Severity. Microsoft has already patched them in version 129.0.2792.52, but millions of users remain exposed due to auto-update delays or manual override settings.

• Heap Incorrect Security UI in Omnibox, SplitView, Fullscreen
• Policy Bypass in Extensions API
• Inappropriate Implementation in V8, Autofill, App-Bound Encryption
• Out-of-Bounds Read in V8 Engine
• Use-After-Free in Ozone and PageInfo
• Race Condition in Storage and V8
• Object Lifecycle Issue in Media Parser
• Type Confusion in V8 JavaScript Engine

Who Is at Risk from This Edge Browser Flaw?

Every user running Microsoft Edge Stable (Chromium) below version 129.0.2792.52 is vulnerable regardless of Windows version, device type, or usage pattern. This includes:

• Home users browsing news, banking, or shopping sites
• Students using Edge for online classes and exams
• Corporate employees accessing internal dashboards
• Government officials handling sensitive documents
• Small business owners managing payments via Edge

The risk multiplies for users who have enabled Copilot AI mode, as it grants the browser deeper access to files, clipboard, and system APIs. A compromised Edge instance could leak passwords, financial data, or confidential emails in seconds.

How Hackers Exploit Microsoft Edge Vulnerabilities

The attack vector is deceptively simple. Cybercriminals create a fake website mimicking a trusted brand like a bank login, e-commerce portal, or government service. When you land on the page, the embedded exploit triggers automatically. No download, no click, no warning.

Within milliseconds, the V8 type confusion flaw confuses the browser’s memory manager, allowing malicious code to escape the sandbox. The use-after-free in Ozone then elevates privileges, granting access to your microphone, webcam, or filesystem. From there, attackers can install keyloggers, encrypt files for ransom, or join botnets.

CERT-In emphasizes that no user interaction is required beyond visiting the page. Drive-by downloads are making a comeback, and Edge’s AI integration makes it a prime target for state-sponsored actors and ransomware gangs.

Step-by-Step: Update Microsoft Edge to Fix Security Holes

Don’t wait for auto-updates. Force the patch now:

• Open Microsoft Edge on your PC
• Click the three-dot menu (top-right)
• Go to Help and feedback → About Microsoft Edge
• The browser will check for updates automatically
• If available, it downloads version 129.0.2792.52 or higher
• Click Restart to apply the patch

Pro tip: Enable “Update browser automatically” in Edge settings to avoid future delays. Enterprises should push the update via WSUS or Intune immediately.

Why This Microsoft Edge Alert Matters More in 2026

With Microsoft Copilot agents rolling out to 1 billion+ Windows users, Edge is no longer just a browser it’s an AI operating system. These agents read your emails, summarize meetings, and automate workflows. A single breach could expose your entire digital life.

India’s Digital Personal Data Protection Act (DPDP) mandates reporting such incidents within 6 hours. Companies using vulnerable Edge versions risk heavy fines, legal action, and reputational damage. CERT-In’s alert is a wake-up call for CIOs and individual users alike.

Moreover, phishing campaigns targeting Indian users have spiked 40% in 2025. Fake UPI pages, Aadhaar updates, and income tax portals are common bait. Without the patch, even tech-savvy users can fall victim.

Additional Safety Measures Beyond the Update

While updating is critical, layer your defense:

• Disable third-party extensions temporarily
• Turn off Autofill for passwords until confirmed safe
• Use Windows Defender Application Guard for Edge
• Avoid clicking email links type URLs manually
• Enable Enhanced Security Mode in Edge settings

The CERT-In Microsoft Edge warning is not hype it’s a verified, exploitable threat. Microsoft has acknowledged the flaws and urges immediate action. Don’t become the next headline in a data breach story.

Stay safe, update today, and spread the word. Your digital security depends on it.