CVE-2026-0404 | Insufficient input validation in NETGEAR Orbi routers

An insufficient input validation vulnerability in NETGEAR Orbi devices' DHCPv6 functionality allows network adjacent attackers authenticated over WiFi or on LAN to execute OS command injections on the router. DHCPv6 is not enabled by default.

Published: 2026-01-13 Last update: 2026-02-12 Assigner: a2826606-91e7-4eb6-899e-8484bd4575d5 Source: a2826606-91e7-4eb6-899e-8484bd4575d5
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-0404 is rated Low Risk (29.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.11%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-0404

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-11 0.18% 0.11% -0.07%
2 2026-05-15 0.13% 0.18% +0.05%
3 2026-03-09 — 0.13% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-0404

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 4.0 MEDIUM
CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber Click to expand
Attack vector (AV:A)
Attacker has to be on an adjacent/local network segment.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:P)
Additional preconditions must be present for exploitation.
Privileges required (PR:L)
Low privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:H)
High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:H)
High integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H)
High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.
Exploit maturity (threat) (E:U)
Unreported: no public PoC, no reported exploitation, and no known simplification tools.
Confidentiality requirement (CR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X)
Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X)
Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X)
Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X)
Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X)
Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X)
Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X)
Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X)
Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X)
Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X)
Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X)
Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X)
Not evaluated.
Automatable (supplemental) (AU:N)
No: attackers cannot reliably automate reconnaissance through exploitation for this issue.
Recovery (supplemental) (R:U)
User: manual user intervention is needed to recover services.
Value density (supplemental) (V:D)
Diffuse: a single exploit event controls relatively limited resources (e.g., one client).
Vulnerability response effort (supplemental) (RE:M)
Moderate effort (remote update, disable subsystem, simple upgrade with minor service impact).
Provider urgency (supplemental) (U:AMBER)
Amber: provider rates moderate urgency.
 — — a2826606-91e7-4eb6-899e-8484bd4575d5
8.0 3.1 HIGH
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.1 5.9 [email protected]

Weakness enumeration for CVE-2026-0404

Affected software / configurations for CVE-2026-0404

Vendor Product Version Raw CPE
netgear rbr750_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbr750_firmware:*:*:*:*:*:*:*:*
netgear rbr840_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbr840_firmware:*:*:*:*:*:*:*:*
netgear rbr850_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbr850_firmware:*:*:*:*:*:*:*:*
netgear rbr860_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbr860_firmware:*:*:*:*:*:*:*:*
netgear rbs750_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbs750_firmware:*:*:*:*:*:*:*:*
netgear rbs840_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbs840_firmware:*:*:*:*:*:*:*:*
netgear rbs850_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbs850_firmware:*:*:*:*:*:*:*:*
netgear rbs860_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbs860_firmware:*:*:*:*:*:*:*:*
netgear rbre950_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbre950_firmware:*:*:*:*:*:*:*:*
netgear rbre960_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbre960_firmware:*:*:*:*:*:*:*:*
netgear rbse950_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbse950_firmware:*:*:*:*:*:*:*:*
netgear rbse960_firmware < 7.2.8.5 cpe:2.3:o:netgear:rbse960_firmware:*:*:*:*:*:*:*:*

References for CVE-2026-0404

URL Tags
https://kb.netgear.com/000070442/January-2026-NETGEAR-Security-Advisory Patch Vendor Advisory
https://www.netgear.com/support/product/rbr750 Patch Product
https://www.netgear.com/support/product/rbr840 Patch Product
https://www.netgear.com/support/product/rbr850 Patch Product
https://www.netgear.com/support/product/rbr860 Patch Product
https://www.netgear.com/support/product/rbre950 Patch Product
https://www.netgear.com/support/product/rbre960 Patch Product
https://www.netgear.com/support/product/rbs750 Patch Product
https://www.netgear.com/support/product/rbs840 Patch Product
https://www.netgear.com/support/product/rbs850 Patch Product
https://www.netgear.com/support/product/rbs860 Patch Product
https://www.netgear.com/support/product/rbse950 Patch Product
https://www.netgear.com/support/product/rbse960 Patch Product
cvelogic Threat Intelligence