High Cryptography exploit reference

CVE-2022-40620 — Improper Certificate Validation in Netgear R6230 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 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.

Published Jan 28, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: mitre

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.3% (30-day exploitation probability)+3
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.31%

ahead of 22% of scored CVEs · Oct 14, 2026

Affects

Netgear

R6230 Firmware and 9 more

CVSS base

7.7

High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Netgear R6230 Firmware, Netgear R6260 Firmware, Netgear R7000 Firmware…).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (cryptography), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Netgear	R6230 Firmware	< 1.1.0.112	Vulnerable	NIST National Vulnerability Database
Netgear	R6260 Firmware	< 1.1.0.88	Vulnerable	NIST National Vulnerability Database
Netgear	R7000 Firmware	< 1.0.11.134	Vulnerable	NIST National Vulnerability Database
Netgear	R8900 Firmware	< 1.0.5.42	Vulnerable	NIST National Vulnerability Database
Netgear	R9000 Firmware	< 1.0.5.42	Vulnerable	NIST National Vulnerability Database
Netgear	Rax120 Firmware	< 1.2.8.40	Vulnerable	NIST National Vulnerability Database
Netgear	Rax120v2 Firmware	< 1.2.8.40	Vulnerable	NIST National Vulnerability Database
Netgear	Rbr20 Firmware	< 2.7.2.26	Vulnerable	NIST National Vulnerability Database
Netgear	Rbs20 Firmware	< 2.7.2.26	Vulnerable	NIST National Vulnerability Database
Netgear	Xr300 Firmware	< 1.0.3.72	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.7	CVSS 3.1	High	2.2	5.5	134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
7.7	CVSS 3.1	High	—	—	CISA-ADP via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L (score shown at the top: 134c704f-9b21-4f2e-91b3-4a467353bcc0)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-295 · Improper Certificate Validation

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.31%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Check TLS negotiations and unexpected certificates in the component’s traffic.

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 7.7
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Jan 28, 2026 · mitre

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

2 on the record

kb.netgear.com/000065132/Security-Advisory-for-Vulnerabilities-in-FunJSQ-on-Some-Rou
Vendor Advisory, NIST National Vulnerability Database
www.onekey.com/resource/security-advisory-netgear-routers-funjsq-vulnerabilities
Exploit, Third Party Advisory, NIST National Vulnerability Database

Elsewhere on this site

Netgear
every CVE for this vendor

Cryptography
same class

CWE-295
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-9214 Insufficient input validation in NETGEAR R7000 router allows administrators to tamper with the device. Aug 11, 2026
Medium CVE-2026-11738 Insufficient input validation in certain NETGEAR Nighthawk routers allows administrators to tamper with the device. Aug 11, 2026
Medium CVE-2026-11814 Command injection vulnerability in certain NETGEAR Nighthawk and Orbi routers Aug 11, 2026
Medium CVE-2026-11735 Stack-based buffer overflow vulnerability in some NETGEAR Nighthawk models Aug 11, 2026
Medium CVE-2026-9210 Certain NETGEAR routers allow authenticated administrators to gain unintended control of the router Jun 9, 2026
High CVE-2026-9212 Insufficient authentication and input validation in certain NETGEAR products Jun 9, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2022-40620 is "Improper Certificate Validation in Netgear R6230 Firmware", rated High. It affects R6230 Firmware (Netgear); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.7 describes technical severity. EPSS 0.31% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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