HOMEVULNERABILITIESCVE-2021-45554
MEDIUM

CVE-2021-45554

CWE-77Published: December 26, 2021· 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 R6400 before 1.0.1.74, R6400v2 before 1.0.4.118, R6700v3 before 1.0.4.118, R7000 before 1.0.11.126, R6900P before 1.3.3.140, R7000P before 1.3.3.140, and R8000 before 1.0.4.74.

NVD Source

Technical Analysis

CVE-2021-45554 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

netgear14 product(s)
r6400 firmwarer6400r6400v2 firmwarer6400v2r6700v3 firmwarer6700v3r7000 firmwarer7000r6900p firmwarer6900pr7000p firmwarer7000p+2
Source: NVD CPE · 14 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

PATCHhttps://kb.netgear.com/000064119/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-PSV-2020-0187
PATCHhttps://kb.netgear.com/000064119/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-PSV-2020-0187

All References (2)

→
https://kb.netgear.com/000064119/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-PSV-2020-0187Patch · Vendor Advisory
→
https://kb.netgear.com/000064119/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-PSV-2020-0187Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2021-45554
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessCWE-77
CISA KEVNo
Affected1 vendor(s)
PublishedDec 26, 2021

Related CVEs (CWE-77)

CVE-2025-61492
10.0
CVE-2015-1815
10.0
CVE-2024-48841
10.0
CVE-2014-1905
10.0
CVE-2015-6912
10.0
CVE-2025-15379
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-45554 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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