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CVE-2021-45507

29
FAUCET Score

CVE-2021-45507 describes a critical authentication bypass vulnerability affecting various NETGEAR devices, including specific versions of CBR40, CBR750, RBW30, RBK752, RBR750, RBS750, RBK852, RBR850, RBS850, and RBS40V. With a CVSS score of 9.8 (CRITICAL), this vulnerability allows an unauthenticated attacker to bypass security measures over the network with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While the EPSS score is low and there is no evidence of active exploitation, publicly available exploit code, or significant community discussion, affected organizations should prioritize patching to mitigate the severe risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.5.0.24CPE matchmatch criteria
cpe:2.3:o:netgear:cbr40_firmware:*:*:*:*:*:*:*:*
< 4.6.3.6CPE matchmatch criteria
cpe:2.3:o:netgear:cbr750_firmware:*:*:*:*:*:*:*:*
< 2.6.2.2CPE matchmatch criteria
cpe:2.3:o:netgear:rbw30_firmware:*:*:*:*:*:*:*:*
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbk752_firmware:*:*:*:*:*:*:*:*
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbr750_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.42%
Probability of exploitation in next 30 days
EPSS Percentile
70.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0142 is in the 57th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

kb.netgear.com / 000064131/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0487
PatchVendor Advisory