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CVE-2021-45621

30
FAUCET Score

CVE-2021-45621 describes a critical command injection vulnerability affecting numerous NETGEAR devices, allowing an unauthenticated attacker to execute arbitrary commands. With a CVSS score of 9.8, this flaw presents a severe risk due to its network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, the widespread impact across many NETGEAR models necessitates immediate patching. Organizations should prioritize updating affected devices to the recommended firmware versions to mitigate this critical risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.5.0.24CPE matchmatch criteria
cpe:2.3:o:netgear:cbr40_firmware:*:*:*:*:*:*:*:*
< 3.2.18.2CPE matchmatch criteria
cpe:2.3:o:netgear:cbr750_firmware:*:*:*:*:*:*:*:*
< 1.0.0.58CPE matchmatch criteria
cpe:2.3:o:netgear:eax20_firmware:*:*:*:*:*:*:*:*
< 1.0.1.68CPE matchmatch criteria
cpe:2.3:o:netgear:eax80_firmware:*:*:*:*:*:*:*:*
< 1.0.3.96CPE matchmatch criteria
cpe:2.3:o:netgear:rax15_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
2.02%
Probability of exploitation in next 30 days
EPSS Percentile
78.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0202 is in the 68th 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 / 000064523/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Routers-Extenders-and-WiFi-Systems-PSV-2020-0562
Vendor Advisory