HOMEVULNERABILITIESCVE-2021-45534
HIGH

CVE-2021-45534

CWE-77Published: December 26, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects AC2100 before 1.2.0.88, AC2400 before 1.2.0.88, AC2600 before 1.2.0.88, D7000 before 1.0.1.82, R6220 before 1.1.0.110, R6230 before 1.1.0.110, R6260 before 1.1.0.84, R6330 before 1.1.0.84, R6350 before 1.1.0.84, R6700v2 before 1.2.0.88, R6800 before 1.2.0.88, R6850 before 1.1.0.84, R6900v2 before 1.2.0.88, R7200 before 1.2.0.88, R7350 before 1.2.0.88, R7400 before 1.2.0.88, and R7450 before 1.2.0.88.

NVD Source

Technical Analysis

CVE-2021-45534 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low 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 7.8.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

netgear34 product(s)
ac2100 firmwareac2100ac2400 firmwareac2400ac2600 firmwareac2600d7000 firmwared7000r6220 firmwarer6220r6230 firmwarer6230+22
Source: NVD CPE · 34 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/000064406/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-DSL-Modem-Routers-PSV-2021-0172
PATCHhttps://kb.netgear.com/000064406/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-DSL-Modem-Routers-PSV-2021-0172
ADVISORYhttps://immersivelabs.com/resources/blog/netgear-vulnerabilities-could-put-small-business-routers-at-risk/
ADVISORYhttps://immersivelabs.com/resources/blog/netgear-vulnerabilities-could-put-small-business-routers-at-risk/

All References (4)

→
https://immersivelabs.com/resources/blog/netgear-vulnerabilities-could-put-small-business-routers-at-risk/Third Party Advisory
→
https://kb.netgear.com/000064406/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-DSL-Modem-Routers-PSV-2021-0172Patch · Vendor Advisory
→
https://immersivelabs.com/resources/blog/netgear-vulnerabilities-could-put-small-business-routers-at-risk/Third Party Advisory
→
https://kb.netgear.com/000064406/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-DSL-Modem-Routers-PSV-2021-0172Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2021-45534
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-77
CISA KEVNo
Affected1 vendor(s)
PublishedDec 26, 2021

Related CVEs (CWE-77)

CVE-2025-15379
10.0
CVE-2015-7541
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CVE-2024-28354
10.0
CVE-2015-6912
10.0
CVE-2014-1905
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CVE-2024-48841
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-45534 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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