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NVD / CVE Program· CNA mitre

CVE-2021-45594: Certain NETGEAR devices are affected by command injection by an authenticated user.

MediumCVSS 6.8 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.81% (FIRST EPSS); higher than 57.4% of all records.
  • Someone on the same network segment can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects RBS50Y before 2.7.3.22, RBR20 before 2.7.3.22, RBR40 before 2.7.3.22, RBR50 before 2.7.3.22, RBS20 before 2.7.3.22, RBS40 before 2.7.3.22, RBS50 before 2.7.3.22, RBK20 before 2.7.3.22, RBK40 before 2.7.3.22, and RBK50 before 2.7.3.22.

Published
Dec 25, 2021
Updated
Jun 17, 2026
EPSS
0.8% · 57th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CNA vs NVD score

NVD
6.8
CNA · mitre
8.4
1.6 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-45594

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
netgearrbr20 firmware
netgearrbr20
netgearrbr40 firmware
netgearrbr40
netgearrbr50 firmware
netgearrbr50
netgearrbs20 firmware
netgearrbs20
netgearrbs40 firmware
netgearrbs40
netgearrbs50 firmware
netgearrbs50

and 8 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • netgear rbk20 firmwarebefore 2.7.3.22
  • netgear rbk40 firmwarebefore 2.7.3.22
  • netgear rbk50 firmwarebefore 2.7.3.22
  • netgear rbr20 firmwarebefore 2.7.3.22
  • netgear rbr40 firmwarebefore 2.7.3.22
  • netgear rbr50 firmwarebefore 2.7.3.22
  • netgear rbs20 firmwarebefore 2.7.3.22
  • netgear rbs40 firmwarebefore 2.7.3.22
  • netgear rbs50 firmwarebefore 2.7.3.22
  • netgear rbs50y firmwarebefore 2.7.3.22

Same product

netgear: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-40619FunJSQ, a third-party module integrated on some NETGEAR routers and Orbi WiFi Systems, exposes an HTTP server over the LAN interface of…
    31Monitor
  • CVE-2022-40620FunJSQ, a third-party module integrated on some NETGEAR routers and Orbi WiFi Systems, does not properly validate TLS certificates when…
    30Monitor
  • CVE-2021-45593Certain NETGEAR devices are affected by command injection by an authenticated user.
    27Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2019-20673Apr 15, 2020 · Certain NETGEAR devices are affected by stored XSS.
    19Monitor
  • ← EarlierCVE-2019-20674Apr 15, 2020 · Certain NETGEAR devices are affected by stored XSS.
    19Monitor
  • ← EarlierCVE-2019-20678Apr 15, 2020 · Certain NETGEAR devices are affected by stored XSS.
    19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records