HOMEVULNERABILITIESCVE-2018-21114
MEDIUM

CVE-2018-21114

CWE-74Published: April 22, 2020· Updated: Jun 17, 2026

6.8
CVSS v3.1

Official Description

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects D7800 before 1.0.1.44, EX6150v2 before 1.0.1.70, EX6100v2 before 1.0.1.70, EX6200v2 before 1.0.1.64, EX7300 before 1.0.2.136, EX6400 before 1.0.2.136, R6100 before 1.0.1.16, R7500 before 1.0.0.110, R7800 before 1.0.2.32, R9000 before 1.0.4.12, WN3000RPv2 before 1.0.0.56, WN3000RPv3 before 1.0.2.52, WNDR4300v2 before 1.0.0.50, and WNDR4500v3 before 1.0.0.50.

NVD Source

Technical Analysis

CVE-2018-21114 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 6.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

netgear26 product(s)
d7800 firmwared7800ex6150 firmwareex6150ex6100 firmwareex6100ex6200 firmwareex6200ex7300 firmwareex7300ex6400 firmwareex6400+14
Source: NVD CPE · 27 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/000060437/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-Modem-Routers-and-Wireless-Extenders-PSV-2017-0645
ADVISORYhttps://kb.netgear.com/000060437/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-Modem-Routers-and-Wireless-Extenders-PSV-2017-0645

All References (2)

→
https://kb.netgear.com/000060437/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-Modem-Routers-and-Wireless-Extenders-PSV-2017-0645Vendor Advisory
→
https://kb.netgear.com/000060437/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-Modem-Routers-and-Wireless-Extenders-PSV-2017-0645Vendor Advisory

Quick Facts

CVE IDCVE-2018-21114
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessCWE-74
CISA KEVNo
Affected1 vendor(s)
PublishedApr 22, 2020

Related CVEs (CWE-74)

CVE-2025-20265
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CVE-2026-44182
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CVE-2023-1523
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CVE-2024-38366
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CVE-2014-8423
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CVE-2020-26282
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-21114 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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