What is the CVSS score of CVE-2026-0404?

CVE-2026-0404 has a CVSS 3.1 base score of 8.0 (High). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2026-0404?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

Rbr750 Firmware CVE-2026-0404

HIGH

Improper Input Validation (CWE-20)

2026-01-13 a2826606-91e7-4eb6-899e-8484bd4575d5

Command Injection Netgear Rbr750 Firmware Rbr840 Firmware Rbr850 Firmware Rbr860 Firmware Rbre950 Firmware Rbre960 Firmware Rbs750 Firmware Rbs840 Firmware Rbs850 Firmware Rbs860 Firmware Rbse950 Firmware Rbse960 Firmware

8.0

CVSS 3.1 · NVD

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Attack ChainAIDerived

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

Access

Connect to NETGEAR Orbi WiFi or LAN
Exploit

Enable DHCPv6 functionality
Execution

Craft malicious DHCPv6 packet with command injection payload
Impact

Execute arbitrary OS commands as root

Vulnerability Assessment

Weakness	CWE CWE-20 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V2 - Validation and Business Logic Input validation, allowlisting
Exploitation Conditions	DHCPv6 must be explicitly enabled on NETGEAR Orbi device (disabled by default). Attacker requires WiFi authentication credentials or direct LAN access. Vulnerable DHCPv6 parser accepts unsanitized input in DHCPv6 protocol fields.
Impact	CVSS 8.0 (HIGH). Attack vector: Adjacent Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitation requires authentication. Exploitable via remote/network.
Exploit ScenarioDerived	A remote attacker (requires authentication) could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Authenticated attackers on the same network can execute arbitrary OS commands on NETGEAR Orbi routers (RBS860, RBR850, RBSE950) through improper validation of DHCPv6 input. The vulnerability requires local or WiFi network access but no user interaction, giving attackers full system compromise capabilities on affected devices. A patch is available for this high-severity flaw.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 8.0

An insufficient input validation vulnerability in NETGEAR Orbi devices' DHCPv6 functionality allows network adjacent attackers authenticated over WiFi or on LAN to execute OS command injections on the router. DHCPv6 is not enabled by default. [CVSS 8.0 HIGH]

RemediationAI

A vendor patch is available — apply it immediately.

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-20 (Improper Input Validation). Affects Rbr750 Firmware. An insufficient input validation vulnerability in NETGEAR Orbi devices' DHCPv6 functionality allows network adjacent attackers authenticated over WiFi or on LAN to execute OS command injections on the router. DHCPv6 is not enabled by default.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.0 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Feb 12, 2026 - 17:36 nvd

Patch available

CVE Published

Jan 13, 2026 - 16:16 nvd

HIGH 8.0

DescriptionCVE.org

Executive ViewAI

Why It Matters

CVE-2026-0404 presents notable security risk, a input validation vulnerability rated CVSS 8.0. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems. A patch is available and should be applied as part of regular vulnerability management.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score

0.1%

Top 68% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

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.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Controlled

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +40

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

OS Command Injection CRITICAL

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Affected Products (CPE)CVE.org

cpe:2.3:o:netgear:rbr750_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbr840_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbr850_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbr860_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbs750_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbs840_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbs850_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbs860_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbre950_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbre960_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbse950_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbse960_firmware:*:*:*:*:*:*:*:*

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