CVE-2026-67822
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductW6-S
PublishedJul 31, 2026
First seenJul 31, 2026
Weakness typeCWE-121CWE-121
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Tenda W6-S | 1.0.0.4(510) | — |
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