CVE Intelligence
Medium Input validation

CVE-2026-9218 — Insufficient input validation vulnerability in Certain NETGEAR routers allows unauthorized access

Insufficient input validation vulnerability in time server (NTP) setting of the listed NETGEAR models allows an attacker who is connected to the router’s local network and has the router’s administrator credentials to run unauthorized commands on the router. This vulnerability could impact the integrity of the affected router. There is no impact on confidentiality or availability of the affected router.

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

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 0.2% (30-day exploitation probability)+1
  • Technical severity (medium)+3

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
0.18%
ahead of 7% of scored CVEs · Oct 14, 2026
Affects
NETGEAR
CBR40 and 3 more
CVSS base
4.5
Medium · 2 source(s)

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.

  1. Identify exposed assets running the affected vendor/product/version combinations (NETGEAR CBR40, NETGEAR R7000, NETGEAR R7000P…).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Search available logs for exploit probes matching the vulnerability class (input validation), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
NETGEAR CBR40 versions not specified by the source Vulnerable CVE Program (cve.org) e CISA ADP
NETGEAR R7000 < v1.0.11.130 Vulnerable CVE Program (cve.org) e CISA ADP
NETGEAR R7000P < V1.3.3.152 Vulnerable CVE Program (cve.org) e CISA ADP
NETGEAR RAX40 < V1.0.3.64 Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

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

Attack vector
Adjacent
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Every base score collected

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

ScoreVersionSeverityExpl.ImpactScored by
4.3 CVSS 4.0 Medium — — a2826606-91e7-4eb6-899e-8484bd4575d5 via NIST National Vulnerability Database
4.3 CVSS 4.0 Medium — — NETGEAR via CVE Program (cve.org) e CISA ADP
4.5 CVSS 3.1 Medium 0.9 3.6 a2826606-91e7-4eb6-899e-8484bd4575d5 via NIST National Vulnerability Database
4.5 CVSS 3.1 Medium — — NETGEAR via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N (score shown at the top: a2826606-91e7-4eb6-899e-8484bd4575d5)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-20 · Improper Input Validation

Other CVEs with this weakness →

Detection

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

  • Not enough vector or weakness data: use the affected application’s logs as a starting point.
application logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · netgear/cbr40, netgear/r7000, netgear/r7000p, netgear/rax40
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • CVSS changed · 4.3 → 4.5
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record published
    Oct 13, 2026
  • CVSS changed · 4.3
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Received
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVE published
    Oct 13, 2026 · NETGEAR

Source activity

Repeated readings are counted rather than listed.

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

References

4 on the record

Elsewhere on this site

NETGEAR
every CVE for this vendor
Input validation
same class
CWE-20
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-9216 Insufficient input validation vulnerability exists in certain NETGEAR RAX Models Sep 8, 2026
  • CVE-2026-9210 Certain NETGEAR routers allow authenticated administrators to gain unintended control of the router Jun 9, 2026
  • CVE-2026-0420 Missing TLS certificate validation in NETGEAR's ReadyCloud client app Jun 9, 2026
  • CVE-2026-0417 Insufficient input validation in certain NETGEAR routers Jun 9, 2026
  • CVE-2026-0410 Insufficient input validation in certain NETGEAR routers Jun 9, 2026
  • CVE-2025-12945 Improper input validation in NETGEAR Nighthawk router R7000P Dec 9, 2025

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 CISA SSVC assessment.
  • 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-2026-9218 is "Insufficient input validation vulnerability in Certain NETGEAR routers allows unauthorized access", rated Medium. It affects CBR40 (NETGEAR); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 4.5 describes technical severity. EPSS 0.18% 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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