What is the CVSS score of CVE-2026-3696?

CVE-2026-3696 has a CVSS 4.0 base score of 5.5 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P. EPSS exploitation probability: 1.4%.

Is there a public PoC exploit available for CVE-2026-3696?

Yes, a public proof-of-concept exploit is available for CVE-2026-3696. Prioritise patching immediately. EPSS: 1.4%.

How to fix or mitigate CVE-2026-3696?

Within 24 hours: Identify all Totolik N300RH devices in your network and isolate them from critical systems; disable WPS functionality if possible and restrict administrative access to the device. Within 7 days: Implement network segmentation to limit router exposure and deploy intrusion detection signatures for CVE-2026-3696 exploitation attempts. Within 30 days: Develop a device replacement plan for Totolink N300RH routers and migrate to vendor-supported alternative equipment with active security updates.

N300rh Firmware CVE-2026-3696

MEDIUM

Command Injection (CWE-77)

2026-03-08 cna@vuldb.com

Command Injection N300rh Firmware TOTOLINK

5.5

CVSS 4.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Send crafted HTTP request to /cgi-bin/cstecgi.cgi
Exploit

Inject OS commands in setWiFiWpsConfig parameter
Impact

Execute arbitrary commands on router

Vulnerability Assessment

Weakness	CWE CWE-77 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Command injection prevention MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Totolik N300RH firmware version 6.x.1c.1353_B20190305 or similar versions with vulnerable /cgi-bin/cstecgi.cgi CGI handler. No authentication required; remote unauthenticated exploitation possible against default configurations.
Impact	CVSS 7.3 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitable via remote/network. Public exploit/POC available.
Exploit ScenarioDerived	A remote attacker could exploit this flaw, os command injection.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 1.4% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

OS command injection in Totolink N300RH firmware allows unauthenticated remote attackers to execute arbitrary commands through the setWiFiWpsConfig function in the CGI handler. Public exploit code exists for this vulnerability, and no patch is currently available. Affected users should restrict network access to the device's management interface until a fix is released.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 7.3

A vulnerability was found in Totolink N300RH 6..1c.1353_B20190305. The affected element is the function setWiFiWpsConfig of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. [CVSS 7.3 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-77 (Command Injection). Affects N300Rh Firmware. A vulnerability was found in Totolink N300RH 6..1c.1353_B20190305. The affected element is the function setWiFiWpsConfig of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation results in os command injection. The attack can be initiated remotely. The exploit has been made public and could be used.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

Low

Vulnerable system: Integrity

Low

Vulnerable system: Availability

Low

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

HIGH MEDIUM

CVSS changed

Apr 29, 2026 - 01:11 NVD

7.3 (HIGH) 5.5 (MEDIUM)

PoC Detected

Mar 10, 2026 - 18:57 vuln.today

Public exploit code

CVE Published

Mar 08, 2026 - 01:15 nvd

HIGH 7.3

DescriptionCVE.org

A vulnerability was found in Totolink N300RH 6..1c.1353_B20190305. The affected element is the function setWiFiWpsConfig of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation results in os command injection. The attack can be initiated remotely. The exploit has been made public and could be used.

Executive ViewAI

Why It Matters

A high-severity vulnerability in Totolink N300RH wireless routers allows remote attackers to execute arbitrary code through the WiFi WPS configuration function. Organizations using this router model face immediate risk of network compromise, unauthorized access, and potential lateral movement into connected systems, as a public exploit is actively available and no patch currently exists.

Business Impact: High

Compensating Controls

Disable WiFi WPS feature on all affected devices; restrict administrative access via firewall rules and network segmentation; implement Web Application Firewall (WAF) rules to block requests to /cgi-bin/cstecgi.cgi with setWiFiWpsConfig parameters; monitor and log all access to the vulnerable CGI endpoint; consider blocking direct internet access to device administration interfaces; deploy intrusion detection/prevention signatures for exploitation attempts.

Threat Intelligence Overview

EPSS Score

1.4%

Top 20% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 1.4%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.