CVE-2026-4254

A weakness has been identified in Tenda AC8 up to 16.03.50.11. This vulnerability affects the function doSystemCmd of the file /goform/SysToolChangePwd of the component HTTP Endpoint. This manipulation of the argument local_2c causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

CVSS v3 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/digitalandrew/tenda_ac8_v5/blob/main/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.md	Exploit Third Party Advisory
https://vuldb.com/?ctiid.351212	Permissions Required VDB Entry
https://vuldb.com/?id.351212	Third Party Advisory VDB Entry
https://vuldb.com/?submit.771773	Third Party Advisory VDB Entry
https://www.tenda.com.cn/	Product

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:tenda:ac8:5.0:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-16 18:16

Updated : 2026-03-20 13:35

NVD link : CVE-2026-4254

Mitre link : CVE-2026-4254

CVE.ORG link : CVE-2026-4254

JSON object : View

Products Affected

tenda

ac8_firmware
ac8

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-121

Stack-based Buffer Overflow

CWE-787

Out-of-bounds Write

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This vulnerability affects the function doSystemCmd of the file /goform/SysToolChangePwd of the component HTTP Endpoint. This manipulation of the argument local_2c causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks."}, {"lang": "es", "value": "Se ha identificado una debilidad en Tenda AC8 hasta la versi\u00f3n 16.03.50.11. Esta vulnerabilidad afecta a la funci\u00f3n doSystemCmd del archivo /goform/SysToolChangePwd del componente Endpoint HTTP. Esta manipulaci\u00f3n del argumento local_2c causa un desbordamiento de b\u00fafer basado en pila. El ataque puede iniciarse remotamente. El exploit se ha puesto a disposici\u00f3n del p\u00fablico y podr\u00eda usarse para ataques."}], "lastModified": "2026-03-20T13:35:42.853", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AEDAB468-CE0D-4BBD-B3B7-25DF2ECDEA37", "versionEndIncluding": "16.03.50.11"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:tenda:ac8:5.0:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "2C8EA663-E451-426B-8CC7-B281436CCFB8"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cna@vuldb.com"}