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CVE-2026-11739: A command injection vulnerability in certain affected NETGEAR Nighthawk devices allows a network-adjacent att

39
Routine
MEDIUM 6.4UPGRADEUPGRADEUPGRADE

CVE-2026-11739 is a medium-severity flaw (CVSS 6.4) affecting ms90 firmware, rax20 firmware, rax200 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A command injection vulnerability in certain affected NETGEAR Nighthawk devices allows a network-adjacent attacker with the ability to intercept and modify local network traffic (attacker in the middle) to compromise the confidentiality and integrity of the affected device.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score6.4 (Medium)
Attack vectorAdjacent network
Attack complexityHigh
Privileges neededLow
User interactionNone
EPSS exploit chance1.1% (top 35%)
CISA exploited listNo
WeaknessCWE-78
Published2026-08-11
Last modified2026-10-23
Publisher (CNA): Netgear, Inc. · Vendor: netgear

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

netgear ms90 firmware UPGRADE
Affected: < 1.0.2.46
Fixed in: 1.0.2.46
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 rax20 firmware UPGRADE
Affected: < 1.0.17.142
Fixed in: 1.0.17.142
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 rax200 firmware UPGRADE
Affected: < 1.0.11.148
Fixed in: 1.0.11.148
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 rax35 firmware UPGRADE
Affected: < 1.0.17.142
Fixed in: 1.0.17.142
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 rax35v2 firmware UPGRADE
Affected: < 1.0.17.142
Fixed in: 1.0.17.142
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 rax41 firmware UPGRADE
Affected: < 1.1.6.36
Fixed in: 1.1.6.36
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.

Exact fixes by distribution

Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
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-2026-11739?

ms90 firmware: upgrade to 1.0.2.46; rax20 firmware: upgrade to 1.0.17.142; rax200 firmware: upgrade to 1.0.11.148. Exact commands for each OS are on this page.

Is CVE-2026-11739 being exploited?

CVE-2026-11739 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-2026-11739 affect?

CVE-2026-11739 affects ms90 firmware, rax20 firmware, rax200 firmware. Severity is medium (CVSS 6.4). A command injection vulnerability in certain affected NETGEAR Nighthawk devices allows a network-adjacent attacker with the ability to intercept and modify local network traffic (attacker in the middle) to compromise the confidentiality

How urgent is CVE-2026-11739?

Priority 39/100. No elevated risk signals yet.

Software pages

Netgear vulnerabilities

Related CVEs

References

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