# CVE-2026-123178: Insufficient Input Validation Vulnerability in NETGEAR Orbi RBR350

Status: published. Published: 2026-11-10. Updated: 2026-11-11.

An insufficient input validation vulnerability in the listed NETGEAR Orbi Models router allows an authenticated administrator connected to the local network to execute unauthorized commands and modify the router’s software and functionality, potentially compromising the integrity of the affected device.

## Remediation

- fix: Devices with automatic updates enabled may already have this patch applied. If not, please check the firmware version and update it to the latest. Fixed in:

ProductFixed VersionRBR350 Orbi AX1800 WiFi 6 Dual-band Mesh Router v4.4.3.4 https://www.netgear.com/support/product/rbr350 RBS350 Orbi AX1800 WiFi 6 Dual-band Mesh Add-on Satellite v4.4.3.4 https://www.netgear.com/support/product/rbs350 (source: CNA: NETGEAR)
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: NETGEAR) — https://www.netgear.com/support/product/rbr350
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: NETGEAR) — https://www.netgear.com/support/product/rbs350

## Affected products and versions

- NETGEAR / RBR350: ≥ 0; < v4.4.3.4 (affected, custom). Source: CNA: NETGEAR
- NETGEAR / RBS350: ≥ 0; < v4.4.3.4 (affected, custom). Source: CNA: NETGEAR

## Severity and prioritization

- CVSS 4.0: 4.3 (medium); CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/V:D/RE:L/U:Amber; source: CNA: NETGEAR

- CVSS 3.1: 4.5 (medium); CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N; source: CNA: NETGEAR

- CVSS 4.0: 4.3 (medium); CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:D/RE:L/U:Amber; source: NVD: a2826606-91e7-4eb6-899e-8484bd4575d5

- CVSS 3.1: 4.5 (medium); CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N; source: NVD: a2826606-91e7-4eb6-899e-8484bd4575d5

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-20

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.netgear.com/support/product/rbr350 (CNA: NETGEAR; product, patch)

- https://www.netgear.com/support/product/rbs350 (CNA: NETGEAR; product, patch)

- https://www.netgear.com/support/product/rbr350 (a2826606-91e7-4eb6-899e-8484bd4575d5)

- https://www.netgear.com/support/product/rbs350 (a2826606-91e7-4eb6-899e-8484bd4575d5)

## Provenance

- CNA: NETGEAR: https://www.cve.org/CVERecord?id=CVE-2026-123178; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-123178; retrieved 2026-11-11; source updated 2026-11-11

Revision: ed34c09fa978d3c3e3fc1182831df33a4b6f248c83b279ac13c3e268b319b157

Canonical: https://y2.dev/cve/CVE-2026-123178

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