Vulnerability Report

CVE-2026-67822

Title: Stack-based buffer overflow in Tenda W6-S

Memory Corruption

Proof Of Concept

PoC Available for CVE-2026-67822

CWE Category NVD-CWE-noinfo
Published Date Jul 31, 2026
Modified Date Jul 31, 2026
Exploit Status Available
Score 9.8 CVSS v
Exploit Probability (EPSS)
0.30%

Vulnerability Summary

CVE-2026-67822: 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.

Impacted Vendors

Analysis in Progress...

Reference Links

https://github.com/Tristerjh/Tenda/blob/main/Tenda_W6-S_GO_overflow.md
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-67822 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/Hunt-Benito/go-without-bounds-cve-2026-67822-stack-overflow-in-tenda-w6-s-wifissidset
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.