Is this vulnerability remotely exploitable?

Yes. If an attacker can reach the router's web management interface, they can send crafted requests to the `setSyslogCfg` endpoint to attempt command injection. Whether this is possible from the internet depends on how the router is deployed and whether remote administration is exposed.

What level of access does an attacker need?

The attacker needs network-level access to the management HTTP interface. In many home or small office setups, this typically means being on the same local network, but misconfigurations or remote management features can make the interface accessible from outside.

What is the safest general fix pattern?

The most robust fix is to eliminate shell-based command construction for syslog configuration entirely and instead use internal APIs or system calls that accept structured parameters. If shell invocation cannot be avoided, input must be strictly validated against an allowlist and passed as discrete arguments, not concatenated strings.

Severity:

HIGH RISK

(7.3)

OS Command Injection (CWE-77) in Totolink A3300R setSyslogCfg Endpoint

CVE-2026-5176

Published:

Mar 30, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-74;CWE-77

Impact:

Remote Code Execution on Embedded Router

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-74;CWE-77

Impact:

Remote Code Execution on Embedded Router

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

OS Command Injection (CWE-77) in Totolink A3300R setSyslogCfg Endpoint

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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