CVE-2026-11736

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Stack-Based Buffer Overflow in NETGEAR Router Firmware

Publication date: 2026-08-11

Last updated on: 2026-09-09

Assigner: Netgear, Inc.

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-11

Last Modified

2026-09-09

Generated

2026-09-21

AI Q&A

2026-08-11

EPSS Evaluated

2026-09-15

NVD

CVE-2026-11736

EUVD

EUVD-2026-56195

Affected Vendors & Products

Vendor	Product	Version / Range
netgear	rax20_firmware	*
netgear	rax35v2_firmware	to 1.0.16.132 (exc)
netgear	rax41_firmware	*
netgear	rax41v2_firmware	to 1.1.4.28 (exc)
netgear	rax42_firmware	*
netgear	rax42v2_firmware	to 1.1.4.28 (exc)
netgear	rax43_firmware	to 1.0.16.132 (exc)
netgear	rax43v2_firmware	to 1.1.4.28 (exc)
netgear	rax45_firmware	*
netgear	rax49s_firmware	to 1.1.4.28 (exc)
netgear	rax50_firmware	to 1.0.16.132 (exc)
netgear	rax50s_firmware	*
netgear	rax50v2_firmware	to 1.1.4.28 (exc)
netgear	rax54sv2_firmware	to 1.1.4.28 (exc)
netgear	rax54v2_firmware	to 1.1.4.28 (exc)
netgear	raxe450_firmware	*
netgear	raxe500_firmware	to 1.2.14.114 (exc)
netgear	xr1000_firmware	to 1.1.0.22 (exc)
netgear	xr1000v2_firmware	to 1.1.0.22 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This is a stack-based buffer overflow vulnerability in certain NETGEAR router models. It allows an authenticated admin user to execute unauthorized modifications to the router's software and functionality by exploiting a flaw in memory handling.

Detection Guidance

Detection of this vulnerability requires checking for unauthorized modifications to router software or functionality. Since this is a stack-based buffer overflow affecting certain NETGEAR models, monitor for unexpected changes in router behavior or firmware. No specific commands are provided in the available context.

Impact Analysis

An attacker with admin access could alter router settings, install malicious firmware, or disrupt network operations. This may lead to unauthorized network access, data interception, or denial of service for connected devices.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance penalties if routers handling sensitive data are compromised.

Mitigation Strategies

Immediately update NETGEAR router firmware to the latest version to patch the stack-based buffer overflow vulnerability. Restrict admin access to trusted users only and monitor network traffic for unauthorized modifications.

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