HOMEVULNERABILITIESCVE-2021-38513
CRITICAL

CVE-2021-38513

NVD-CWE-noinfoPublished: August 11, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Certain NETGEAR devices are affected by authentication bypass. This affects RBK852 before 3.2.10.11, RBR850 before 3.2.10.11, RBS850 before 3.2.10.11, CBR40 before 2.5.0.10, EAX20 before 1.0.0.48, MK62 before 1.0.6.110, MR60 before 1.0.6.110, MS60 before 1.0.6.110, RBK752 before 3.2.10.10, RBR750 before 3.2.10.10, and RBS750 before 3.2.10.10.

NVD Source

Technical Analysis

CVE-2021-38513 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

netgear22 product(s)
rbk852 firmwarerbk852rbr850 firmwarerbr850rbs850 firmwarerbs850cbr40 firmwarecbr40eax20 firmwareeax20mk62 firmwaremk62+10
Source: NVD CPE · 22 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/000063777/Security-Advisory-for-Authentication-Bypass-on-Some-Extenders-and-WiFi-Systems-PSV-2020-0008
ADVISORYhttps://kb.netgear.com/000063777/Security-Advisory-for-Authentication-Bypass-on-Some-Extenders-and-WiFi-Systems-PSV-2020-0008

All References (2)

→
https://kb.netgear.com/000063777/Security-Advisory-for-Authentication-Bypass-on-Some-Extenders-and-WiFi-Systems-PSV-2020-0008Vendor Advisory
→
https://kb.netgear.com/000063777/Security-Advisory-for-Authentication-Bypass-on-Some-Extenders-and-WiFi-Systems-PSV-2020-0008Vendor Advisory

Quick Facts

CVE IDCVE-2021-38513
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedAug 11, 2021

Related CVEs (NVD-CWE-noinfo)

CVE-2017-6326
10.0
CVE-2024-22216
10.0
CVE-2023-38586
10.0
CVE-2023-40455
10.0
CVE-2023-45894
10.0
CVE-2024-44146
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-38513 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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