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CVE-2021-45667

15
FAUCET Score

CVE-2021-45667 is a stored Cross-Site Scripting (XSS) vulnerability affecting numerous NETGEAR router and extender models, including various CBR40, EAX, EX, R79xxP, RAX, RBS, RBW, MS, and MR series devices. The vulnerability has a CVSSv3.1 score of 4.8 (Medium), indicating that an attacker with high privileges could inject malicious scripts into affected devices, which would then be executed in a victim's browser upon viewing the compromised page. While the attack complexity is low, user interaction is required, and the potential impact is limited to low confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.5.0.10CPE matchmatch criteria
cpe:2.3:o:netgear:cbr40_firmware:*:*:*:*:*:*:*:*
< 1.0.0.48CPE matchmatch criteria
cpe:2.3:o:netgear:eax20_firmware:*:*:*:*:*:*:*:*
< 1.0.1.64CPE matchmatch criteria
cpe:2.3:o:netgear:eax80_firmware:*:*:*:*:*:*:*:*
< 1.0.0.64CPE matchmatch criteria
cpe:2.3:o:netgear:ex6120_firmware:*:*:*:*:*:*:*:*
< 1.0.0.44CPE matchmatch criteria
cpe:2.3:o:netgear:ex6130_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
0.7
Impact Score
5.3
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 50th percentile among its peer group of 4,937 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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 / 000064481/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Router-Extenders-and-WiFi-Systems-PSV-2020-0256
PatchVendor Advisory