CVE-2026-67822CWE-121

CVE-2026-67822

Critical · published July 31, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
43.3
In the wild
Unconfirmed
What it is

Tenda W6-S 1.0.0.4(510) contains a stack-based buffer overflow vulnerability in the /goform/wifiSSIDset endpoint. The function formwrlSSIDset uses sprintf to copy user-controlled 'GO' and 'index' parameters into a 64-byte stack buffer without length restriction, leading to stack overflow.

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
0.00519 · 43.3th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-07-31T21:16Z
References (2)
https://github.com/Tristerjh/Tenda/blob/main/Tenda_W6-S_GO_overflow.md · [email protected]https://github.com/Tristerjh/Tenda/blob/main/Tenda_W6-S_GO_overflow.md · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 31 JUL 00:00Z
    Tenda W6-S 1.0.0.4(510) contains a stack-based buffer overflow vulnerability in the /goform/wifiSSIDset endpoint
    cvelistv5