VulnerabilityDeferred

CVE-2026-67822

Tenda W6-S 1.0.0.4(510) contains a stack-based buffer overflow vulnerability in the /goform/wifiSSIDset endpoint.

CRITICAL 9.8EPSS 0.31%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.31% probability · 24th percentile
CISA KEV: Not listed
Weakness: CWE-121
Source: cve@mitre.org

References

https://github.com/Tristerjh/Tenda/blob/main/Tenda_W6-S_GO_overflow.md
https://github.com/Tristerjh/Tenda/blob/main/Tenda_W6-S_GO_overflow.md

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.