CVE-2025-63835

A stack-based buffer overflow vulnerability was discovered in Tenda AC18 v15.03.05.05_multi

Medium · published November 10, 2025

CVSS v3.1
6.5
EPSS
1%
Percentile
52.3
In the wild
Unconfirmed
What it is

⚠️ A simple oversized string is all it takes for attackers to turn your Tenda AC18 into a paperweight! Think of it like a party where someone sends in a ridiculously large cake meant for all the guests—only to have it block the door, preventing anyone from entering or leaving! If exploited, this stack-based buffer overflow can cause your device to crash, denying access to your network. Even more alarming, savvy attackers might leverage it for remote code execution, opening the door to a world of chaos.

Put simply

Think of it like a party where someone sends in a ridiculously large cake meant for all the guests—only to have it block the door, preventing anyone from entering or leaving! This vulnerability resides in the guestSsid parameter of the /goform/WifiGuestSet interface, where an attacker can send oversized data, causing the stack to overflow and potentially leading to system instability or unauthorized access.

What to do

If exploited, this stack-based buffer overflow can cause your device to crash, denying access to your network. Even more alarming, savvy attackers might leverage it for remote code execution, opening the door to a world of chaos. To protect your Tenda AC18, upgrade to the latest firmware version immediately. Additionally, consider applying stringent input validation on parameters to fend off oversized data submissions and enhance your overall network security. You've got this! Act now to secure your device and keep those pesky attackers at bay! 🛡️

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00693 · 52.3th percentile
Published
2025-11-10T00:00Z
EPSS history
Timeline
  • 10 NOV 00:00Z
    A stack-based buffer overflow vulnerability was discovered in Tenda AC18 v15.03.05.05_multi
    cvelistv5