What is the CVSS score of CVE-2026-0403?

CVE-2026-0403 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-2026-0403?

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

Rbe970 Firmware CVE-2026-0403

HIGH

Improper Input Validation (CWE-20)

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

Command Injection Netgear Rbe970 Firmware Rbe971 Firmware Rbr750 Firmware Rbr850 Firmware Rbr860 Firmware Rbre960 Firmware Rbs750 Firmware Rbs850 Firmware Rbs860 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 Orbi router LAN
Exploit

Access vulnerable administrative interface
Execution

Inject OS commands via unvalidated input field
Impact

Execute arbitrary commands with router privileges

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	Attacker must be connected to NETGEAR Orbi router's local network (LAN). Requires valid router login credentials to access administrative web interface where command injection input validation is insufficient.
Impact	CVSS 8.0 (HIGH). Attack vector: Adjacent Network. Complexity: Low. Privileges required: Low. User interaction: None.
Exploit ScenarioDerived	An attacker 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

NETGEAR Orbi routers (RBS850, RBE970, RBS750) are vulnerable to OS command injection through inadequate input validation, enabling attackers on the local network to execute arbitrary commands with elevated privileges. The vulnerability requires LAN access and low privileges but provides complete system compromise through high-impact code execution capabilities. A patch is available for affected firmware versions.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 8.0

An insufficient input validation vulnerability in NETGEAR Orbi routers allows attackers connected to the router's LAN to execute OS command injections. [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 Rbe971 Firmware. An insufficient input validation vulnerability in NETGEAR Orbi routers allows attackers connected to the router's LAN to execute OS command injections.

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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 20, 2026 - 19:38 nvd

Patch available

CVE Published

Jan 13, 2026 - 16:16 nvd

HIGH 8.0

DescriptionCVE.org

An insufficient input validation vulnerability in NETGEAR Orbi routers allows attackers connected to the router's LAN to execute OS command injections.

Executive ViewAI

Why It Matters

Organizations using An insufficient input validation vulnerability in NETGEAR Orbi routers face notable risk from CVE-2026-0403, 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 76% 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.