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CVE-2021-45596

22
FAUCET Score

CVE-2021-45596 describes a critical command injection vulnerability affecting specific NETGEAR devices, including certain CBR750, RBK/RBR/RBS750, and RBK/RBR/RBS850 models running firmware versions prior to 4.6.3.6 or 3.2.17.12. This flaw allows an authenticated attacker to execute arbitrary commands on the affected device. With a CVSS score of 8.8 (High), the vulnerability can be exploited remotely over the network with low attack complexity, leading to high impacts on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.6.3.6CPE matchmatch criteria
cpe:2.3:o:netgear:cbr750_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:*:*:*:*:*:*:*:*
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbs750_firmware:*:*:*:*:*:*:*:*
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbk852_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.4HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.7
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.53%
Probability of exploitation in next 30 days
EPSS Percentile
72.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0153 is in the 70th percentile among its peer group of 17,844 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, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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 / 000064140/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-WiFi-Systems-PSV-2020-0516
PatchVendor Advisory