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Vulnerability record · CVE-2026-67822 · published 31 July 2026

CVE-2026-67822: Stack-based buffer overflow vulnerability

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.

9.8 CVSS 3.1 Critical EPSS 0.52% · top 58.2% CWE-121 · Stack-based buffer overflow Deferred
9.8CVSS 3.1 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
31 Aug 2026Last modified by NVD

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/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
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

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Source: NIST National Vulnerability Database (record CVE-2026-67822), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.