What is the CVSS score of CVE-2021-29066?

CVE-2021-29066 has a CVSS 3.1 base score of 9.6 (Critical). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.6%.

Rbr850 Firmware CVE-2021-29066

CRITICAL

2021-03-23 cve@mitre.org

Authentication Bypass Netgear Rbr850 Firmware Rbs850 Firmware Rbk852 Firmware Rbk853 Firmware Rbk854 Firmware

9.6

CVSS 3.1 · NVD

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Vulnerability Assessment

Impact	CVSS score of 9.6 (CRITICAL). Attack characteristics: adjacent network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 0.6% exploitation probability (EPSS)

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AnalysisAI

Certain NETGEAR devices are affected by authentication bypass. Rated critical severity (CVSS 9.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

Certain NETGEAR devices are affected by authentication bypass. This affects RBK852 before 3.2.17.12, RBK853 before 3.2.17.12, RBK854 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12. Affected products include: Netgear Rbk852 Firmware, Netgear Rbk853 Firmware, Netgear Rbk854 Firmware, Netgear Rbr850 Firmware, Netgear Rbs850 Firmware. Version information: before 3.2.17.12.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.6 CRITICAL

AV:A/AC:L/PR:N/UI:N/S:C/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

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

DescriptionNVD

Threat Intelligence Overview

EPSS Score

0.6%

Top 55% exploitable

Data Quality

2 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 CRITICAL

CISA KEV No

Public POC No

EPSS 0.6%

Patch available No

Active threat No

Deciding rule

CRITICAL severity

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· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +48

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:o:netgear:rbk852_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbk853_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:rbk854_firmware:*:*:*:*:*:*:*:*

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

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