TI-2026-03701 Aliases CVE-2026-4254 GHSA-7ppq-fx8r-g889

Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow

HIGH 81CWE-119Published 2026-03-16 · Updated 2026-03-16

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00923 60th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Tenda	AC8	16.03.50.0; 16.03.50.1; 16.03.50.2; 16.03.50.3; 16.03.50.4; 16.03.50.5; 16.03.50.6; 16.03.50.7; 16.03.50.8; 16.03.50.9; 16.03.50.10; 16.03.50.11	—	No fix listed	CNA

AC8 VendorTenda Affected 16.03.50.0; 16.03.50.1; 16.03.50.2; 16.03.50.3; 16.03.50.4; 16.03.50.5; 16.03.50.6; 16.03.50.7; 16.03.50.8; 16.03.50.9; 16.03.50.10; 16.03.50.11 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:tenda:ac8_firmware::::::::	up to 16.03.50.11	Vulnerable	Tenda
cpe:2.3:h:tenda:ac8:5.0:::::::*	5.0	Running on	Tenda

cpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:* Versions up to 16.03.50.11 Vulnerable ·Tenda
cpe:2.3:h:tenda:ac8:5.0:*:*:*:*:*:*:* Versions 5.0 Running on ·Tenda

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-4254
2026-10-03 Alias added: GHSA-7ppq-fx8r-g889

References

Exploit 1

https://github.com/digitalandrew/tenda_ac8_v5/blob/main/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.md

Other 1

https://www.tenda.com.cn/

TI-2025-20992 Tenda AC8 V16.03.34.06 is vulnerable to Buffer Overflow in the fromSetRouteStatic function via the parameter list. CVSS 3.1CRITICAL 9.8
TI-2024-31083 Tenda AC8v4 V16.03.34.06 has a stack overflow vulnerability in the fromAdvSetMacMtuWan function. CVSS 3.1CRITICAL 9.8
TI-2023-20197 Tenda AC10 V1.0 V15.03.06.23, AC1206 V15.03.06.23, AC8 v4 V16.03.34.06, AC6 V2.0… CVSS 3.1CRITICAL 9.8
TI-2023-20195 Tenda AC1206 V15.03.06.23, AC8 V4 V16.03.34.06, AC5 V1.0 V15.03.06.28, AC10 v4.0… CVSS 3.1CRITICAL 9.8
TI-2023-20191 Tenda AC10 V1.0 V15.03.06.23, AC1206 V15.03.06.23, AC8 v4 V16.03.34.06, AC6 V2.0… CVSS 3.1CRITICAL 9.8
TI-2023-04372 Tenda AC8 formSetDeviceName stack-based overflow CVSS 3.1CRITICAL 9.8

See all 61 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences