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CVE-2021-38527

31
FAUCET Score

CVE-2021-38527 describes a critical command injection vulnerability impacting numerous NETGEAR devices, including various Orbi and Nighthawk models. An unauthenticated attacker can exploit this flaw to execute arbitrary commands on affected devices. With a CVSS score of 9.8, this vulnerability poses a severe risk, allowing for complete compromise of confidentiality, integrity, and availability. While there are no known public exploits or active exploitation, the vulnerability has garnered significant community discussion, indicating potential future interest from threat actors.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.5.0.14CPE matchmatch criteria
cpe:2.3:o:netgear:cbr40_firmware:*:*:*:*:*:*:*:*
< 1.0.1.98CPE matchmatch criteria
cpe:2.3:o:netgear:ex6100_firmware:*:*:*:*:*:*:*:*
< 1.0.1.98CPE matchmatch criteria
cpe:2.3:o:netgear:ex6150_firmware:*:*:*:*:*:*:*:*
< 1.0.0.132CPE matchmatch criteria
cpe:2.3:o:netgear:ex6250_firmware:*:*:*:*:*:*:*:*
< 1.0.2.158CPE matchmatch criteria
cpe:2.3:o:netgear:ex6400_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.69%
Probability of exploitation in next 30 days
EPSS Percentile
74.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0169 is in the 62nd percentile among its peer group of 36,835 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 / 000063778/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Extenders-Routers-and-WiFi-Systems-PSV-2020-0025
Vendor Advisory