CVE-2026-0403: An insufficient input validation vulnerability in NETGEAR Orbi routers allows attackers connected to the rout

Q: How do I fix CVE-2026-0403?

rbe971 firmware: upgrade to 9.10.0.2; rbe970 firmware: upgrade to 9.10.0.2; rbr750 firmware: upgrade to 7.2.8.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-0403 being exploited?

CVE-2026-0403 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-0403 affect?

CVE-2026-0403 affects rbe971 firmware, rbe970 firmware, rbr750 firmware. Severity is high (CVSS 8.0). An insufficient input validation vulnerability in NETGEAR Orbi routers allows attackers connected to the router's LAN to execute OS command injections.

Routine

HIGH 8.0UPGRADEUPGRADEUPGRADE

CVE-2026-0403 is a high-severity flaw (CVSS 8.0) affecting rbe971 firmware, rbe970 firmware, rbr750 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An insufficient input validation vulnerability in NETGEAR Orbi routers allows attackers connected to the router's LAN to execute OS command injections.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-01-13
Last modified	2026-06-17

Publisher (CNA): Netgear, Inc. · Vendor: netgear

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-13 16:16 UTCPublished CVE record published
2026-06-17 10:10 UTCUpdated Record last modified

netgear rbe971 firmware UPGRADE

Affected: < 9.10.0.2

Fixed in: 9.10.0.2

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear rbe970 firmware UPGRADE

Affected: < 9.10.0.2

Fixed in: 9.10.0.2

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear rbr750 firmware UPGRADE

Affected: < 7.2.8.5

Fixed in: 7.2.8.5

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear rbr850 firmware UPGRADE

Affected: < 7.2.8.5

Fixed in: 7.2.8.5

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear rbr860 firmware UPGRADE

Affected: < 7.2.8.5

Fixed in: 7.2.8.5

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netgear rbs750 firmware UPGRADE

Affected: < 7.2.8.5

Fixed in: 7.2.8.5

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-0403?

rbe971 firmware: upgrade to 9.10.0.2; rbe970 firmware: upgrade to 9.10.0.2; rbr750 firmware: upgrade to 7.2.8.5. Exact commands for each OS are on this page.

Is CVE-2026-0403 being exploited?

CVE-2026-0403 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-0403 affect?

CVE-2026-0403 affects rbe971 firmware, rbe970 firmware, rbr750 firmware. Severity is high (CVSS 8.0). An insufficient input validation vulnerability in NETGEAR Orbi routers allows attackers connected to the router's LAN to execute OS command injections.

How urgent is CVE-2026-0403?

Priority 35/100. High severity

Software pages

Netgear vulnerabilities

References

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