Command Injection Vulnerability in TOTOLINK A950RG Cloud Upgrade Component
CVE-2026-116504

9.4CRITICAL

Key Information:

Vendor

Totolink
Status
A950rg
Vendor
CVE Published:
26 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-116504?

A vulnerability exists in the TOTOLINK A950RG router's Cloud Upgrade component, specifically in the 'setCloudUpgradeFW' function found in the 'lib/cste_modules/upgrade.so' file. This issue allows an attacker to manipulate the 'FileName' argument, potentially leading to command injection. Such an exploit can be executed remotely, posing significant risks to users. It is crucial for users of the affected version to apply necessary security measures to safeguard against potential exploits.

Affected Version(s)

A950RG 4.1.2cu.5268_B20221104

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-116504 - Proof of Concept

References

https://vuldb.com/vuln/426402
vdb-entrytechnical-description
https://vuldb.com/vuln/426402/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-116504
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LiuYijun_JX.SGCC (VulDB User)
.