CVE-2026-116504— TOTOLINK A950RG Cloud Upgrade upgrade.so setCloudUpgradeFW command injection

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 中发现一个安全漏洞。该漏洞影响 Cloud Upgrade 组件中文件 lib/cste_modules/upgrade.so 的 setCloudUpgradeFW 函数。攻击者通过操纵 FileName 参数可触发命令注入。此攻击可远程发起，且利用方法已向公众公开，可能被恶意利用。

CVSS 9.9 · Critical Updated Oct 27, 2026

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Vulnerability Information

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Vulnerability Title

TOTOLINK A950RG Cloud Upgrade upgrade.so setCloudUpgradeFW command injection

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability has been found in TOTOLINK A950RG 4.1.2cu.5268_B20221104. This affects the function setCloudUpgradeFW of the file lib/cste_modules/upgrade.so of the component Cloud Upgrade. The manipulation of the argument FileName leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

在命令中使用的特殊元素转义处理不恰当(命令注入)

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-2026-116504

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-116504

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Other References for CVE-2026-116504 (4)

https://gist.github.com/H3rmesk1t/c2f2dcfdb6238a7ddb8fb0622ad52948 exploit
https://vuldb.com/cve/CVE-2026-116504 third-party-advisory
https://vuldb.com/vuln/426402/cti signature permissions-required
https://vuldb.com/submit/1022553 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-116504

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

CVE-2026-116508	10.0 CRITICAL	TOTOLINK A950RG Device-Information CGI infostat.cgi sub_402340 stack-based overflow
CVE-2026-116506	9.9 CRITICAL	TOTOLINK A950RG firewall.so apmib_set 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-77