CVE-2026-116508— TOTOLINK A950RG Device-Information CGI infostat.cgi sub_402340 stack-based overflow

Quick assessment

Affected

TOTOLINK A950RG

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 TOTOLINK A950RG 固件版本 4.1.2cu.5268_B20221104 中发现一处安全漏洞。该漏洞影响设备信息 CGI 组件中 infostat.cgi 文件的 sub_402340 函数。攻击者通过操纵 CONTENT_LENGTH 参数，可触发基于栈的缓冲区溢出。此漏洞可被远程利用，且相关利用代码（Exploit）已公开，可能被用于发起攻击。

CVSS 10.0 · Critical Updated Oct 27, 2026

Possible ATT&CK Techniques 2 AI

T1203 · Exploitation for Client Execution T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

TOTOLINK A950RG Device-Information CGI infostat.cgi sub_402340 stack-based overflow

Source: CVE Program / CVE List V5

Vulnerability Description

A security flaw has been discovered in TOTOLINK A950RG 4.1.2cu.5268_B20221104. Affected by this issue is the function sub_402340 of the file infostat.cgi of the component Device-Information CGI. Performing a manipulation of the argument CONTENT_LENGTH results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
TOTOLINK	A950RG	4.1.2cu.5268_B20221104	`cpe:2.3:o:totolink:a950rg_firmware::::::::`

II. Public POCs for CVE-2026-116508

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-116508

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Other References for CVE-2026-116508 (4)

https://gist.github.com/H3rmesk1t/ad72def4ccc232757d4cbabf45da72cb exploit
https://vuldb.com/cve/CVE-2026-116508 third-party-advisory
https://vuldb.com/vuln/426406/cti signature permissions-required
https://vuldb.com/submit/1022557 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-116508

Same Patch Batch · TOTOLINK · 2026-10-26 · 5 CVEs total

CVE-2026-116506	9.9 CRITICAL	TOTOLINK A950RG firewall.so apmib_set command injection
CVE-2026-116504	9.9 CRITICAL	TOTOLINK A950RG Cloud Upgrade upgrade.so setCloudUpgradeFW command injection
CVE-2026-116505	9.1 CRITICAL	TOTOLINK A950RG device-information udhcpd.leases getDeviceInfo command injection
CVE-2026-116507	5.3 MEDIUM	TOTOLINK A950RG global.so getLanguageCfg information disclosure

IV. Related Vulnerabilities

Same product: A950RG

Same vendor: TOTOLINK

Same weakness: CWE-121