CVE-2026-4903— Tenda AC5 POST Request QuickIndex formQuickIndex memory corruption
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I. Basic Information for CVE-2026-4903
Vulnerability Information
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Vulnerability Title
Tenda AC5 POST Request QuickIndex formQuickIndex memory corruption
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw has been found in Tenda AC5 15.03.06.47. This vulnerability affects the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. This manipulation of the argument PPPOEPassword causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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 AC5 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC5是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC5 15.03.06.47版本存在安全漏洞，该漏洞源于对组件POST Request Handler中文件/goform/QuickIndex的参数PPPOEPassword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)
Affected Products
II. Public POCs for CVE-2026-4903
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- Submit #777380: Tenda AC5 AC5 V1.0 V15.03.06.47 Buffer Overflowthird-party-advisory
- CVE-2026-4903 Tenda AC5 POST Request QuickIndex formQuickIndex stack-based overflowvdb-entrytechnical-description
- https://nvd.nist.gov/vuln/detail/CVE-2026-4903
Same Patch Batch · Tenda · 2026-03-26 · 4 CVEs total
| CVE-2026-4905 | 8.8 HIGH | Tenda AC5 POST Request WifiWpsOOB formWifiWpsOOB stack-based overflow |
| CVE-2026-4904 | 8.8 HIGH | Tenda AC5 POST Request setcfm formSetCfm stack-based overflow |
| CVE-2026-4902 | 8.8 HIGH | Tenda AC5 POST Request addressNat fromAddressNat memory corruption |
IV. Related Vulnerabilities
Same product: AC5
- CVE-2026-4906
Tenda AC5 POST Request WizardHandle decodePwd stack-based ov - CVE-2026-4905
Tenda AC5 POST Request WifiWpsOOB formWifiWpsOOB stack-based - CVE-2026-4904
Tenda AC5 POST Request setcfm formSetCfm stack-based overflo - CVE-2026-4902
Tenda AC5 POST Request addressNat fromAddressNat memory corr - CVE-2025-6887
Tenda AC5 SetSysTimeCfg stack-based overflow
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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