CVE-2025-12209CWE-119CWE-121

CVE-2025-12209

High · published October 27, 2025

CVSS v3.1
8.8
EPSS
1%
Percentile
63.4
In the wild
Unconfirmed
What it is

🚨 A remote attacker can trigger a stack-based buffer overflow in Tenda O3 with just a manipulative argument! This means your device could be at risk! ⚡ Think of it like a waiter who serves dinner without checking the order—one incorrect dish could cause chaos in the kitchen! In this case, the argument manipulation allows attackers to overflow the stack, potentially leading to unauthorized access and control. An attacker could exploit this vulnerability to crash the device or even execute arbitrary code, allowing them to control the device remotely. This could lead to devastating consequences, including data theft or the device being turned into a staging ground for further attacks against your network.

Put simply

Think of it like a waiter who serves dinner without checking the order—one incorrect dish could cause chaos in the kitchen! In this case, the argument manipulation allows attackers to overflow the stack, potentially leading to unauthorized access and control. The vulnerability exists in the SetValue/GetValue functions of Tenda O3’s DHCP configuration file. Manipulating the 'dhcpEn' argument can cause a stack-based buffer overflow, enabling attackers to run any code they desire remotely.

What to do

An attacker could exploit this vulnerability to crash the device or even execute arbitrary code, allowing them to control the device remotely. This could lead to devastating consequences, including data theft or the device being turned into a staging ground for further attacks against your network. To secure your device, update Tenda O3 to the latest firmware version immediately. Ensure that you restrict access to the device and monitor for any suspicious activity while you patch this issue. You've got this! Secure your device, and let's keep our networks safe together! 🛡️

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01029 · 63.4th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2025-10-27T07:15Z
Affected products (1)
ProductVersionsFixed in
tenda/o3_firmware1.0.0.10\(2478\)all versions—
References (6)
EPSS history
Timeline
  • 27 OCT 03:02Z
    Tenda O3 setDhcpConfig GetValue stack-based overflow
    cvelistv5