CVE-2026-4252— Tenda AC8 IPv6 check_is_ipv6 ip address for authentication
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I. Basic Information for CVE-2026-4252
Vulnerability Information
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Vulnerability Title
Tenda AC8 IPv6 check_is_ipv6 ip address for authentication
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
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
信任自主报告的IP地址
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版本存在安全漏洞，该漏洞源于对组件IPv6 Handler的函数check_is_ipv6的操作导致依赖IP地址进行身份验证，可能导致身份验证绕过。
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-2026-4252
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- Too many requests · GitHubexploit
- CVE-2026-4252 Tenda AC8 IPv6 check_is_ipv6 ip address for authenticationvdb-entrytechnical-description
- Submit #771759: Tenda AC8 V5 V16.03.50.11 Authentication Bypass Issuesthird-party-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-4252
Same Patch Batch · Tenda · 2026-03-16 · 3 CVEs total
| CVE-2026-4254 | 9.8 CRITICAL | Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow |
| 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-2026-4254
Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-b - CVE-2026-4253
Tenda AC8 Web UploadCfg route_set_user_policy_rule os comman - 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-291
V. Comments for CVE-2026-4252
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