HOMEVULNERABILITIESCVE-2018-21226
HIGH

CVE-2018-21226

CWE-269Published: April 28, 2020· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

Certain NETGEAR devices are affected by authentication bypass. This affects JNR1010v2 before 1.1.0.48, JWNR2010v5 before 1.1.0.48, WNR1000v4 before 1.1.0.48, WNR2020 before 1.1.0.48, and WNR2050 before 1.1.0.48.

NVD Source

Technical Analysis

CVE-2018-21226 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

netgear10 product(s)
jnr1010 firmwarejnr1010jwnr2010 firmwarejwnr2010wnr1000 firmwarewnr1000wnr2020 firmwarewnr2020wnr2050 firmwarewnr2050
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://kb.netgear.com/000055110/Security-Advisory-for-Authentication-Bypass-on-Some-Routers-PSV-2017-0748
ADVISORYhttps://kb.netgear.com/000055110/Security-Advisory-for-Authentication-Bypass-on-Some-Routers-PSV-2017-0748

All References (2)

→
https://kb.netgear.com/000055110/Security-Advisory-for-Authentication-Bypass-on-Some-Routers-PSV-2017-0748Vendor Advisory
→
https://kb.netgear.com/000055110/Security-Advisory-for-Authentication-Bypass-on-Some-Routers-PSV-2017-0748Vendor Advisory

Quick Facts

CVE IDCVE-2018-21226
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-269
CISA KEVNo
Affected1 vendor(s)
PublishedApr 28, 2020

Related CVEs (CWE-269)

CVE-2025-0505
10.0
CVE-2020-27655
10.0
CVE-2024-6240
10.0
CVE-2022-24783
10.0
CVE-2026-31852
10.0
CVE-2021-1388
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-21226 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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