HOMEVULNERABILITIESCVE-2021-45502
HIGH

CVE-2021-45502

NVD-CWE-noinfoPublished: December 26, 2021· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

Certain NETGEAR devices are affected by authentication bypass. This affects CBR750 before 4.6.3.6, RBK752 before 3.2.17.12, RBK752 before 3.2.17.12, RBR750 before 3.2.17.12, RBS750 before 3.2.17.12, RBK852 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12.

NVD Source

Technical Analysis

CVE-2021-45502 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

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 8.8.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

netgear14 product(s)
cbr750 firmwarecbr750rbk752 firmwarerbk752rbr750 firmwarerbr750rbs750 firmwarerbs750rbk852 firmwarerbk852rbr850 firmwarerbr850+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

ADVISORYhttps://kb.netgear.com/000064126/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0473
ADVISORYhttps://kb.netgear.com/000064126/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0473

All References (2)

→
https://kb.netgear.com/000064126/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0473Vendor Advisory
→
https://kb.netgear.com/000064126/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0473Vendor Advisory

Quick Facts

CVE IDCVE-2021-45502
CVSS Score8.8 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedDec 26, 2021

Related CVEs (NVD-CWE-noinfo)

CVE-2010-0071
10.0
CVE-2024-22216
10.0
CVE-2019-25136
10.0
CVE-2017-6326
10.0
CVE-2023-45894
10.0
CVE-2015-6787
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-45502 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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