CVE-2022-43106

Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the schedStartTime parameter in the setSchedWifi function

Critical · published November 3, 2022

CVSS v3.1
9.8
EPSS
1%
Percentile
62.9
In the wild
Unconfirmed
What it is

🚨 A stack overflow lurking in Tenda AC23 could leave your network wide open! 🔥 Just a crafty tweak to the `schedStartTime` parameter is enough to trigger this critical flaw! Think of it like a waiter at a restaurant who doesn't check if the order is too big and ends up spilling everything on the floor — one rogue input can crash the whole system! If exploited, this vulnerability could allow attackers to execute arbitrary code, potentially taking control of your entire router. This means they could snoop on your network, change settings, or even cut off your internet access entirely — absolutely devastating!

Put simply

Think of it like a waiter at a restaurant who doesn't check if the order is too big and ends up spilling everything on the floor — one rogue input can crash the whole system! The stack overflow occurs in the `setSchedWifi` function when a maliciously crafted `schedStartTime` parameter is processed, leading to possible remote code execution without proper checks.

What to do

If exploited, this vulnerability could allow attackers to execute arbitrary code, potentially taking control of your entire router. This means they could snoop on your network, change settings, or even cut off your internet access entirely — absolutely devastating! To defend against this, immediately update your Tenda AC23 firmware to the latest version provided by the manufacturer. Additionally, ensure your router's configuration settings are properly locked down and monitor for any suspicious activity. Taking these steps will bolster your defenses! You've got this! Stay vigilant and keep your network secure! 🛡️

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
0.01013 · 62.9th percentile
Published
2022-11-03T00:00Z
EPSS history
Timeline
  • 03 NOV 00:00Z
    Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the schedStartTime parameter in the setSchedWifi function
    cvelistv5