What is the CVSS score of CVE-2022-40620?

CVE-2022-40620 has a CVSS 3.1 base score of 7.7 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L. EPSS exploitation probability: 0.1%.

Which versions of TLS are affected by CVE-2022-40620?

NETGEAR routers and Orbi WiFi systems are vulnerable to man-in-the-middle attacks during firmware updates due to improper TLS certificate validation in the FunJSQ module.

Is there a public PoC exploit available for CVE-2022-40620?

Yes, a public proof-of-concept exploit is available for CVE-2022-40620. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2022-40620?

Within 24 hours: Identify all NETGEAR and Orbi devices in your environment and document affected models/firmware versions; disable auto-update functionality if possible through device settings or management console. Within 7 days: Isolate affected devices to a segmented network with restricted outbound HTTPS traffic, and configure network monitoring to detect suspicious firmware update attempts. Within 30 days: Establish a communication plan with affected stakeholders; monitor NETGEAR security advisories for patch availability; plan staged firmware updates over secure, monitored channels once patches release.

TLS CVE-2022-40620

HIGH

Improper Certificate Validation (CWE-295)

2026-01-28 cve@mitre.org

Netgear TLS R6230 Firmware Rax120 Firmware R8900 Firmware R9000 Firmware R7000 Firmware Xr300 Firmware Rbr20 Firmware Rbs20 Firmware Rax120v2 Firmware R6260 Firmware

7.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.7 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Mar 09, 2026 - 14:41 vuln.today

Public exploit code

CVE Published

Jan 28, 2026 - 19:16 nvd

HIGH 7.7

DescriptionCVE.org

FunJSQ, a third-party module integrated on some NETGEAR routers and Orbi WiFi Systems, does not properly validate TLS certificates when downloading update packages through its auto-update mechanism. An attacker (suitably positioned on the network) could intercept the update request and deliver a malicious update package in order to gain arbitrary code execution on affected devices. This affects R6230 before 1.1.0.112, R6260 before 1.1.0.88, R7000 before 1.0.11.134, R8900 before 1.0.5.42, R9000 before 1.0.5.42, and XR300 before 1.0.3.72 and Orbi RBR20 before 2.7.2.26, RBR50 before 2.7.4.26, RBS20 before 2.7.2.26, and RBS50 before 2.7.4.26.

AnalysisAI

Technical ContextAI

Classified as CWE-295 (Improper Certificate Validation). Affects Rbr20 Firmware. FunJSQ, a third-party module integrated on some NETGEAR routers and Orbi WiFi Systems, does not properly validate TLS certificates when downloading update packages through its auto-update mechanism. An attacker (suitably positioned on the network) could intercept the update request and deliver a malicious update package in order to gain arbitrary code execution on affected devices. This affects R6230 before 1.1.0.112, R6260 before 1.1.0.88, R7000 before 1.0.11.134, R8900 before 1.0.5.42, R9000 b

RemediationAI

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

CVE-2022-40620 vulnerability details – vuln.today

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TLS CVE-2022-40620

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code