CVE-2026-4254

Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow

Assigner: VulDB
Reserved: 16.03.2026 Published: 16.03.2026 Updated: 16.03.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.0

CVSS Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
CVSS Score: 10

Access Vector	Network	Confidentiality Impact	Complete
Access Complexity	Low	Integrity Impact	Complete
Authentication	None	Availability Impact	Complete

CVSS 2.0

Product Status

Vendor	Tenda
Product	AC8
Versions	Version 16.03.50.0 is affected Version 16.03.50.1 is affected Version 16.03.50.2 is affected Version 16.03.50.3 is affected Version 16.03.50.4 is affected Version 16.03.50.5 is affected Version 16.03.50.6 is affected Version 16.03.50.7 is affected Version 16.03.50.8 is affected Version 16.03.50.9 is affected Version 16.03.50.10 is affected Version 16.03.50.11 is affected

Vendor

Tenda

Product

AC8

Versions

Version 16.03.50.0 is affected
Version 16.03.50.1 is affected
Version 16.03.50.2 is affected
Version 16.03.50.3 is affected
Version 16.03.50.4 is affected
Version 16.03.50.5 is affected
Version 16.03.50.6 is affected
Version 16.03.50.7 is affected
Version 16.03.50.8 is affected
Version 16.03.50.9 is affected
Version 16.03.50.10 is affected
Version 16.03.50.11 is affected

Credits

DigitalAndrew (VulDB User) reporter

References

Problem Types