CVE-2026-11736: A stack-based buffer overflow vulnerability affects certain NETGEAR models allowing an authenticated admin use
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Routine
MEDIUM 4.9MITIGATEUPGRADEMITIGATE
CVE-2026-11736 is a medium-severity flaw (CVSS 4.9) affecting rax20 firmware, rax35v2 firmware, rax41 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A stack-based buffer overflow vulnerability affects certain NETGEAR models allowing an authenticated admin user to make unauthorized modification to router software and functionality.
Last updated 2026-09-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
netgear rax20 firmware MITIGATE
Affected: all versions
Fixed in: no fixed release known
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: < 1.0.16.132
Fixed in: 1.0.16.132
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 MITIGATE
Affected: all versions
Fixed in: no fixed release known
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 rax41v2 firmware UPGRADE
Affected: < 1.1.4.28
Fixed in: 1.1.4.28
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 rax42 firmware MITIGATE
Affected: all versions
Fixed in: no fixed release known
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 rax42v2 firmware UPGRADE
Affected: < 1.1.4.28
Fixed in: 1.1.4.28
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 sourceNVD · 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-2026-11736?
rax20 firmware: mitigate or apply the listed mitigation; rax35v2 firmware: upgrade to 1.0.16.132; rax41 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2026-11736 being exploited?
CVE-2026-11736 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-2026-11736 affect?
CVE-2026-11736 affects rax20 firmware, rax35v2 firmware, rax41 firmware. Severity is medium (CVSS 4.9). A stack-based buffer overflow vulnerability affects certain NETGEAR models allowing an authenticated admin user to make unauthorized modification to router software and functionality.
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