URGENT MOBILE ALERT • HARDWARE FLAWS

YOUR PHONE IS VULNERABLE: MediaTek Patches Multiple High-Severity Security Flaws in Wi-Fi & GPS Chips

By CyberDudeBivash • October 11, 2025 • V7 “Goliath” Deep Dive

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Disclosure: This is an urgent security advisory for all mobile device users. It contains affiliate links to security solutions we recommend. Your support helps fund our public awareness efforts.

Definitive Guide: Table of Contents

Part 1: The Executive & User Briefing — A Flaw in the Silicon

This is a critical security alert for hundreds of millions of Android users worldwide. **MediaTek**, one of the world’s largest semiconductor companies, has released patches for multiple high-severity vulnerabilities in the firmware of its Wi-Fi and GPS chips. These are not flaws in an app you can uninstall; they are flaws in the physical hardware of your phone. An unpatched device is at risk of a “zero-click” remote takeover or a denial of service of its critical location services.

The Risk is Severe:

**The Wi-Fi Flaw (CVE-2025-50201):** This is a remotely triggerable Remote Code Execution (RCE) vulnerability. An attacker in physical proximity to your device (e.g., on the same public Wi-Fi network) could send a malicious packet and potentially take full control of your phone.
**The GPS Flaw (CVE-2025-50202):** This flaw could allow an attacker with a GPS spoofer to send a malformed signal that crashes your phone’s GPS chip, disabling all location services.

For CISOs (The BYOD Risk):

If your employees use personal Android devices for work, this is a critical threat. The Wi-Fi RCE is particularly dangerous as it could be wormable, allowing an attacker to move from a compromised employee’s phone to other devices on your corporate network. You must mandate that all employees install the latest security updates on their devices.

Part 2: Technical Deep Dive — Anatomy of the Wi-Fi RCE and GPS DoS

CVE-2025-50201: Buffer Overflow in the Wi-Fi Firmware

This is a classic buffer overflow vulnerability in the low-level C code of the Wi-Fi chip’s firmware. The flaw exists in the function that parses specific 802.11 management frames. An attacker can craft a malicious frame with an oversized data element. When the vulnerable firmware tries to process this frame, it copies the oversized data into a small, fixed-size buffer on the stack, overwriting adjacent memory and, critically, the function’s return address. This allows the attacker to hijack the execution flow and run their own shellcode directly on the Wi-Fi chip, from which they can pivot to compromise the main application processor.

CVE-2025-50202: Integer Overflow in the GPS Parser

This flaw exists in the code that parses the GPS navigation message broadcast by satellites. An attacker with a powerful GPS spoofer can broadcast a custom, malformed navigation message. This message contains a data field specifying a length that, due to an integer overflow, is misinterpreted by the firmware. This leads to an uncontrolled memory allocation, exhausting the GPS chip’s limited memory and causing it to crash, resulting in a Denial of Service for all location services on the phone.

Part 3: The Defender’s Playbook — An Urgent Guide to Patching and Hardening

For All Users:

**UPDATE YOUR PHONE NOW:** This is the only fix. Go to **`Settings` > `System` > `System Update`** (this may vary slightly by manufacturer) and install the latest Android security patch. This patch will contain the updated firmware from MediaTek.
**Be Wary of Untrusted Wi-Fi:** Until you have patched, avoid connecting to open, public Wi-Fi networks (e.g., at airports, cafes).
**Use a VPN:** A VPN encrypts all the traffic leaving your device, which can provide a layer of protection against some network-based attacks.

Protect Your Mobile Life: A powerful mobile security app is essential. **Kaspersky for Android** can provide a crucial safety net by detecting malicious network activity and scanning for threats.

For Enterprise Security Teams:

Your BYOD policy is now your incident response plan.

**Mandate Patching with MDM/UEM:** Use your device management platform to identify all devices with MediaTek chips and enforce the installation of the latest security patch. Restrict corporate data access for any non-compliant devices.
**Network Segmentation:** Ensure your corporate, guest, and BYOD Wi-Fi networks are properly segmented to prevent a compromised mobile device from being able to attack your internal servers.

Part 4: The Strategic Aftermath — The Systemic Risk of the Semiconductor Supply Chain

For CISOs, this incident is a powerful lesson in the systemic risk of the **software and hardware supply chain**. Your organization’s security is not just dependent on the operating systems and applications you use; it is dependent on the security of the silicon chips and firmware deep inside your devices. A single vulnerability in a chip from a single vendor can instantly create a critical risk across millions of endpoints from dozens of different manufacturers.

This highlights the critical importance of a robust, rapid, and enterprise-wide patching program. It is no longer enough to just patch your servers; you must have the visibility and control to manage the patch status of every single endpoint that touches your data, including mobile devices.

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About the Author

CyberDudeBivash is a cybersecurity strategist with 15+ years in mobile security, hardware reverse engineering, and incident response, advising CISOs across APAC. [Last Updated: October 11, 2025]

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