CVE-2022-40866

Tenda W20E router V15.11.0.6 (US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC) contains a stack overflow vulnerability in the function formSetDebugCfg with…

Critical · published September 23, 2022

CVSS v3.1
9.8
EPSS
1%
Percentile
67.3
In the wild
Unconfirmed
What it is

🔥 A stack overflow vulnerability in Tenda W20E routers could allow an attacker to take control with just a single malformed request! Think of it like someone jamming too many packages into a delivery truck until it collapses under the weight — the system simply can't handle it and breaks down. This flaw makes it easy for an attacker to push the system past its limits and take over! If exploited, an attacker could execute arbitrary code on the router, potentially gaining full control over your network. This means they could intercept traffic, manipulate settings, or even launch attacks on devices connected to the network — absolutely devastating!

Put simply

Think of it like someone jamming too many packages into a delivery truck until it collapses under the weight — the system simply can't handle it and breaks down. This flaw makes it easy for an attacker to push the system past its limits and take over! This vulnerability is in the function formSetDebugCfg with the request /goform/setDebugCfg/, where insufficient input validation leads to a stack overflow, allowing for potential arbitrary code execution.

What to do

If exploited, an attacker could execute arbitrary code on the router, potentially gaining full control over your network. This means they could intercept traffic, manipulate settings, or even launch attacks on devices connected to the network — absolutely devastating! Immediate action is required: Please update the router firmware to the latest version, which addresses this vulnerability. Ensure you regularly check for updates and apply them promptly to minimize risks. Additionally, consider changing default passwords to strengthen your security posture. You've got this! By following these steps, you’re on track to lock down your network and safeguard your devices! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01174 · 67.3th percentile
Published
2022-09-23T14:26Z
EPSS history
Timeline
  • 23 SEP 14:26Z
    Tenda W20E router V15.11.0.6 (US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC) contains a stack overflow vulnerability in the function formSetDebugCfg with…
    cvelistv5