HOMEVULNERABILITIESCVE-2018-21154
MEDIUM

CVE-2018-21154

CWE-78Published: April 27, 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 1.0.1.34, DM200 before 1.0.0.50, R6100 before 1.0.1.22, R7500 before 1.0.0.122, R7500v2 before 1.0.3.26, and R7800 before 1.0.2.42.

NVD Source

Technical Analysis

CVE-2018-21154 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

netgear10 product(s)
d7800 firmwared7800dm200 firmwaredm200r6100 firmwarer6100r7500 firmwarer7500r7800 firmwarer7800
Source: NVD CPE · 11 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/000059479/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Gateways-and-Routers-PSV-2017-3133
ADVISORYhttps://kb.netgear.com/000059479/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Gateways-and-Routers-PSV-2017-3133

All References (2)

→
https://kb.netgear.com/000059479/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Gateways-and-Routers-PSV-2017-3133Vendor Advisory
→
https://kb.netgear.com/000059479/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Gateways-and-Routers-PSV-2017-3133Vendor Advisory

Quick Facts

CVE IDCVE-2018-21154
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessCWE-78
CISA KEVNo
Affected1 vendor(s)
PublishedApr 27, 2020

Related CVEs (CWE-78)

CVE-2014-9727
10.0
CVE-2016-10043
10.0
CVE-2026-34234
KEV10.0
CVE-2026-33478
KEV10.0
CVE-2024-58338
10.0
CVE-2013-2578
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-21154 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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