What is CVE-2026-11737?

CVE-2026-11737 is Some NETGEAR Nighthawk devices allow administrators to tamper with the device. The supplied enrichment data classifies it as Remote Code Exec mapped to CWE-20 Improper Input Validation.

Which versions are affected?

Affected product and version evidence is listed in the product table above. Current public advisories should be checked for exact version scope before patch targeting is finalized.

Is there active exploitation?

Active exploitation is not confirmed from current sources for CVE-2026-11737. If exploitation is not confirmed from current sources, teams should document that status and continue monitoring KEV, vendor, and telemetry updates.

No. CVE-2026-11737 is not listed in CISA KEV in the supplied enrichment data. KEV status should be monitored because it can change after initial disclosure or after exploitation becomes publicly confirmed.

Is there a public exploit?

3 public PoC repositories reported; 0 marked weaponized in current dataset. Public exploit or PoC availability should raise triage priority, especially for exposed or business-critical systems.

How can defenders detect it?

Start with EDR process telemetry, host service logs where available. Look for vulnerability-class behavior, product errors, suspicious authentication events, exploit probes, and abnormal process activity based only on evidence that applies to the affected product.

How should teams prioritize it?

Prioritize CVE-2026-11737 using CVSS 4.3, EPSS 0%, KEV status, public PoC status, and asset exposure. Internet-facing, privileged, or business-critical deployments should be handled first.

Are workarounds available?

Workarounds are not confirmed from current sources. Fixed-version evidence is listed in the mitigation section above.

Which threat actors are linked publicly?

No public threat actor linkage is confirmed from current sources. Do not attribute exploitation to a threat actor unless the source evidence explicitly supports that linkage.

What should be done in the next 24 hours?

Identify exposed assets running affected vendor/product/version combinations. Prioritize based on EPSS, PoC availability, and external exposure. Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class. Open remediation tickets with affected assets, owners, evidence status, and detection coverage so decisions are traceable.

mediumRemote Code Execpublic exploit

CVE-2026-11737

CVE-2026-11737 — Some NETGEAR Nighthawk devices allow administrators to tamper with the device

Insufficient input validation vulnerability in the listed NETGEAR models allows authenticated administrators connected to the local network to make unauthorized modification to the device software and functionality.

Published Aug 11, 2026Updated Aug 11, 2026Sources: NVD, NETGEAR (CNA), GitHub, SOCRadar CTI

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Exploit code

public exploit, none observed

EPSS

ahead of 0% of scored CVEs

Affects

NETGEAR

13 products listed

CVSS base

4.3

medium

Remediation

The vendor's own words where we have them.

Devices with automatic updates enabled may already have this patch applied. If not, please check the firmware version and update it to the latest. Fixed in: ProductFixed VersionRAX20 (EoS) 4-Stream AX1800 WiFi 6 Router V1.0.18.144 https://www.netgear.com/support/product/rax20/ RAX41 (EoS) Nighthawk AX5 5-Stream AX3600 WiFi Router V1.1.6.36 https://www.netgear.com/support/product/rax41/ RAX41v2 Nighthawk AX5 5-Stream AX3600 WiFi Router V1.1.6.36 https://www.netgear.com/support/product/rax41v2/ RAX42 (EoS) Nighthawk AX5 5-Stream AX4200 WiFi Router V1.1.6.36 https://www.netgear.com/support/produ…

First 24 hours

Ordered from the record's own fields — exposure first, because you cannot patch what you have not found.

Identify exposed assets running affected vendor/product/version combinations.
Prioritize based on EPSS, PoC availability, and external exposure.
Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class.

Affected scope

Vendor, product and version as the advisories word them.

Vendor	Product	Status
NETGEAR	RAX20	Vulnerable
NETGEAR	RAX41	Vulnerable
NETGEAR	RAX41v2	Vulnerable
NETGEAR	RAX42	Vulnerable
NETGEAR	RAX42v2	Vulnerable
NETGEAR	RAX43	Vulnerable
NETGEAR	RAX43v2	Vulnerable
NETGEAR	RAX45	Vulnerable
NETGEAR	RAX49S	Vulnerable
NETGEAR	RAX50	Vulnerable
NETGEAR	RAX50v2	Vulnerable
NETGEAR	RAX54S	Vulnerable

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Source
4.3	CVSS 4.0	medium	—	—	NETGEAR (CNA)

CVSS:4.0/AV:A/AC:L/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

What this weakness leads to

MITRE's own consequences and mitigations for the weakness class — the authority's wording, not guidance derived from the CVSS vector.

MITRE

CWE-20 · Improper Input Validation

DoS: Crash, Exit, or Restart
DoS: Resource Consumption (CPU)
DoS: Resource Consumption (Memory)
Read Memory

Mitigation: Consider using language-theoretic security (LangSec) techniques that characterize inputs using a formal language and build recognizers for that language. This effectively requires parsing to be a distinct layer that effectively enforces a boundary between raw input and internal data representations, instead of allowing parser code to be scattered throughout the program, where it could be subject to errors or inconsistencies that create weaknesses. [REF-1109] [REF-1110] [REF-1111]

Weakness & attack patterns

CWE-20Improper Input Validation

Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.

CAPEC-10 · Buffer Overflow via Environment VariablesCAPEC-101 · Server Side Include (SSI) InjectionCAPEC-104 · Cross Zone ScriptingCAPEC-108 · Command Line Execution through SQL InjectionCAPEC-109 · Object Relational Mapping InjectionCAPEC-110 · SQL Injection through SOAP Parameter TamperingCAPEC-120 · Double EncodingCAPEC-13 · Subverting Environment Variable ValuesCAPEC-135 · Format String InjectionCAPEC-136 · LDAP InjectionCAPEC-14 · Client-side Injection-induced Buffer OverflowCAPEC-153 · Input Data Manipulation

T1562.003Impair Defenses: Impair Command History Logging
T1574.006Hijack Execution Flow: Dynamic Linker Hijacking
T1574.007Hijack Execution Flow: Path Interception by PATH Environment Variable

Public exploit

Capability, not use: code existing is a different claim from anyone running it.

Repositories

Detection

Read off the CVSS vector and the weakness class. Starting points, not rules we have tested.

Monitor for scanner or exploit-pattern traffic after 3 public PoC repositories were reported.

EDR process telemetryhost service logs

Timeline

What happened to this CVE, newest first — with the readings a source repeats on a schedule counted underneath rather than listed.

2026
Added · CVSS 3.1 4.3
Aug 11, 2026 · NVD
Initial · CVE published
Aug 11, 2026 · NVD

References

11 on the record

www.netgear.com/support/product/rax20/
Vendor Advisory
www.netgear.com/support/product/rax41/
Vendor Advisory
www.netgear.com/support/product/rax41v2/
Vendor Advisory
www.netgear.com/support/product/rax42/
Vendor Advisory
www.netgear.com/support/product/rax42v2/
Vendor Advisory
www.netgear.com/support/product/rax43/
Vendor Advisory
www.netgear.com/support/product/rax43v2/
Vendor Advisory
www.netgear.com/support/product/rax45/
Vendor Advisory

Elsewhere on this site

NETGEARevery CVE for this vendor
Remote Code Execsame class
CWE-20other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record1

What should defenders know first?

CVE-2026-11737 is Some NETGEAR Nighthawk devices allow administrators to tamper with the device, a medium vulnerability affecting RAX20, RAX41, RAX41v2, RAX42, RAX42v2, RAX43, RAX43v2, RAX45, RAX49S, RAX50, RAX50v2, RAX54S, RAX54Sv2 from NETGEAR. The current evidence does not list it in CISA KEV, and the exploit status is: Active exploitation is not confirmed from current sources for CVE-2026-11737. Public exploit evidence is: 3 public PoC repositories reported; 0 marked weaponized in current dataset. The affected-version evidence is listed in the key facts and affected products tables. Defenders should first verify whether exposed or business-critical assets run those versions, then apply vendor patches or mitigations, restrict reachable attack surface, and preserve logs for detection review. CVSS 4.3 describes technical severity, while EPSS 0% helps estimate near-term exploit likelihood; neither replaces asset context. Unknown fields should remain explicit in tickets, and threat actor, IOC, victimology, or payload claims should not be added unless a cited source supports them. Monitor CISA KEV, vendor advisories, NVD changes, public PoC repositories, and internal telemetry for update triggers.