CVE-2026-4254— Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow
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I. Basic Information for CVE-2026-4254
Vulnerability Information
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Vulnerability Title
Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
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)
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Affected Products
II. Public POCs for CVE-2026-4254
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- Too many requests · GitHubexploit
- Submit #771773: Tenda AC8 V5 V16.03.50.11 Buffer Overflowthird-party-advisory
- CVE-2026-4254 Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflowvdb-entrytechnical-description
- https://nvd.nist.gov/vuln/detail/CVE-2026-4254
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
- CVE-2026-4253
Tenda AC8 Web UploadCfg route_set_user_policy_rule os comman - CVE-2026-4252
Tenda AC8 IPv6 check_is_ipv6 ip address for authentication - CVE-2026-3044
Tenda AC8 Httpd Service UploadCfg webCgiGetUploadFile stack- - CVE-2026-2203
Tenda AC8 Embedded Httpd Service fast_setting_wifi_set buffe - CVE-2026-2202
Tenda AC8 httpd WifiGuestSet fromSetWifiGusetBasic buffer ov
Same vendor: Tenda
- CVE-2026-8265
Tenda AC6 httpd getLogFile get_log_file os command injection - CVE-2026-8264
Tenda AC6 httpd WifiApScan formWifiApScan os command injecti - CVE-2026-8263
Tenda AC6 httpd WifiExtraSet fromSetWirelessRepeat os comman - CVE-2026-8259
Tenda AC6 httpd telnet os command injection - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based
Same weakness: CWE-121
- CVE-2026-8258
Squirrel sqstdstring.cpp validate_format stack-based overflo - CVE-2026-8234
EFM ipTIME A8004T WifiBasicSet formWifiBasicSet stack-based - CVE-2026-6665
PgBouncer buffer overflow in SCRAM - CVE-2026-41509
Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based
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