HOMEVULNERABILITIESCVE-2021-45542
MEDIUM

CVE-2021-45542

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 RAX200 before 1.0.4.120, RAX75 before 1.0.4.120, RAX80 before 1.0.4.120, RBK852 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12.

NVD Source

Technical Analysis

CVE-2021-45542 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

netgear12 product(s)
rax200 firmwarerax200rax75 firmwarerax75rax80 firmwarerax80rbk852 firmwarerbk852rbr850 firmwarerbr850rbs850 firmwarerbs850
Source: NVD CPE · 12 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/000064143/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-WiFi-Systems-PSV-2020-0540
ADVISORYhttps://kb.netgear.com/000064143/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-WiFi-Systems-PSV-2020-0540

All References (2)

→
https://kb.netgear.com/000064143/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-WiFi-Systems-PSV-2020-0540Vendor Advisory
→
https://kb.netgear.com/000064143/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-WiFi-Systems-PSV-2020-0540Vendor Advisory

Quick Facts

CVE IDCVE-2021-45542
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessCWE-77
CISA KEVNo
Affected1 vendor(s)
PublishedDec 26, 2021

Related CVEs (CWE-77)

CVE-2015-3408
10.0
CVE-2017-7876
10.0
CVE-2014-9682
10.0
CVE-2015-6912
10.0
CVE-2017-7722
10.0
CVE-2024-32766
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-45542 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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