Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-4254— Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow

Quick assessment

Affected
Tenda AC8
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tenda AC8是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC8 16.03.50.11及之前版本存在安全漏洞，该漏洞源于对文件/goform/SysToolChangePwd中参数local_2c的错误操作，可能导致基于栈的缓冲区溢出。

CVSS 9.8 · Critical EPSS 1.32% · P70

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-4254

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda AC8 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC8是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC8 16.03.50.11及之前版本存在安全漏洞，该漏洞源于对文件/goform/SysToolChangePwd中参数local_2c的错误操作，可能导致基于栈的缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.

Read summary Full analysis (login)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tenda AC8 16.03.50.0 cpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4254

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 13337 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-4254

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-4254 (2)

News Coverage for CVE-2026-4254 (1)

Same Patch Batch · Tenda · 2026-03-16 · 3 CVEs total

CVE-2026-4252 9.8 CRITICAL Tenda AC8 IPv6 check_is_ipv6 ip address for authentication
CVE-2026-4253 4.7 MEDIUM Tenda AC8 Web UploadCfg route_set_user_policy_rule os command injection

IV. Related Vulnerabilities

Same product: AC8
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-4254

No comments yet

Leave a comment