OS Command Injection Vulnerability in Linksys E5350 by Linksys
CVE-2026-121932

10CRITICAL

Key Information:

Vendor

Linksys
Status
E5350
Vendor
CVE Published:
4 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-121932?

A significant vulnerability exists in the Linksys E5350 router, specifically affecting version 1.0.00.037. The issue lies within the system functionality of the file /wizard/apply.cgi, where improper handling of arguments such as ping_ip and traceroute_ip can lead to OS command injection. This flaw allows attackers to execute arbitrary commands on the router’s operating system, enabling remote exploitation. Despite early disclosure to the vendor, no response was received, raising concerns about the security of users relying on this product. Immediate action is advised to mitigate potential risks associated with this vulnerability.

Affected Version(s)

E5350 1.0.00.037

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-2026-121932 - Proof of Concept

References

https://vuldb.com/vuln/431044
vdb-entrytechnical-description
https://vuldb.com/vuln/431044/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-121932
third-party-advisory

CVSS V4

Score:
10
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

liuyingqi (VulDB User)
VulDB CNA Team
.