CVE-2021-45740

TOTOLINK A720R v4.1.5cu.470_B20200911 was discovered to contain a stack overflow in the setWiFiWpsStart function

published February 4, 2022

CVSS
—
EPSS
1%
Percentile
71.6
In the wild
Unconfirmed
What it is

⚠️ A tiny parameter is causing a stack overflow in TOTOLINK A720R! Just like a blocked drain, it can flood your WiFi connection and cause a Denial of Service. 😱 Think of the 'setWiFiWpsStart' function as a restaurant kitchen. If the head chef gets an overwhelming number of complex orders at once (like an oversized pin parameter), it can cause chaos and shut down the entire kitchen, leaving diners frustrated and hungry. This stack overflow vulnerability allows attackers to send specific requests that can completely disrupt your network service. In simple terms, an attacker could make your router unusable and send you scrambling for a reboot!

Put simply

Think of the 'setWiFiWpsStart' function as a restaurant kitchen. If the head chef gets an overwhelming number of complex orders at once (like an oversized pin parameter), it can cause chaos and shut down the entire kitchen, leaving diners frustrated and hungry. In TOTOLINK A720R v4.1.5cu.470_B20200911, the 'setWiFiWpsStart' function does not properly manage input from the pin parameter, leading to a stack overflow. This flaw can be exploited to perform Denial of Service attacks on the device.

What to do

This stack overflow vulnerability allows attackers to send specific requests that can completely disrupt your network service. In simple terms, an attacker could make your router unusable and send you scrambling for a reboot! To protect yourself, update your TOTOLINK A720R router to the latest firmware version as soon as it becomes available. Regularly review your device’s settings to ensure no unusual configurations are present. 🛡️ You've got this! Stay proactive, and your network will be secure in no time! 💪✨

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01363 · 71.6th percentile
Published
2022-02-04T01:33Z
EPSS history
Timeline
  • 04 FEB 01:33Z
    TOTOLINK A720R v4.1.5cu.470_B20200911 was discovered to contain a stack overflow in the setWiFiWpsStart function
    cvelistv5