CVE-2021-38527

CRITICAL

9.8

CVSS Score

Published: August 11, 2021 at 12:01 AM UTC

Updated: June 17, 2026 at 04:02 AM UTC

67 products affected across 1 vendorR7800 FirmwareRBR850 FirmwareRBS850 Firmware

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Severity

CRITICAL9.8

Exploit prediction

EPSS 2%

Description

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects CBR40 before 2.5.0.14, EX6100v2 before 1.0.1.98, EX6150v2 before 1.0.1.98, EX6250 before 1.0.0.132, EX6400 before 1.0.2.158, EX6400v2 before 1.0.0.132, EX6410 before 1.0.0.132, EX6420 before 1.0.0.132, EX7300 before 1.0.2.158, EX7300v2 before 1.0.0.132, EX7320 before 1.0.0.132, EX7700 before 1.0.0.216, EX8000 before 1.0.1.232, R7800 before 1.0.2.78, RBK12 before 2.6.1.44, RBR10 before 2.6.1.44, RBS10 before 2.6.1.44, RBK20 before 2.6.1.38, RBR20 before 2.6.1.36, RBS20 before 2.6.1.38, RBK40 before 2.6.1.38, RBR40 before 2.6.1.36, RBS40 before 2.6.1.38, RBK50 before 2.6.1.40, RBR50 before 2.6.1.40, RBS50 before 2.6.1.40, RBK752 before 3.2.16.6, RBR750 before 3.2.16.6, RBS750 before 3.2.16.6, RBK852 before 3.2.16.6, RBR850 before 3.2.16.6, RBS850 before 3.2.16.6, RBS40V before 2.6.2.4, RBS50Y before 2.6.1.40, RBW30 before 2.6.2.2, and XR500 before 2.3.2.114.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

CBR40 Firmware · NETGEAR

95%

v < 2.5.0.14

Affected range stops below 2.5.0.14, so it looks safe — our inference, not a vendor statement

netgear-cbr40 (same device)

EX6100 Firmware · NETGEAR

95%

v < 1.0.1.98

Affected range stops below 1.0.1.98, so it looks safe — our inference, not a vendor statement

EX6150 Firmware · NETGEAR

95%

v < 1.0.1.98

Affected range stops below 1.0.1.98, so it looks safe — our inference, not a vendor statement

netgear-ex6150 (same device)

EX6250 Firmware · NETGEAR

95%

v < 1.0.0.132

Affected range stops below 1.0.0.132, so it looks safe — our inference, not a vendor statement

netgear-ex6250 (same device)

EX6400 Firmware · NETGEAR

95%

v < 1.0.0.132v < 1.0.2.158

Affected range stops below 1.0.0.132, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.0.2.158, so it looks safe — our inference, not a vendor statement

netgear-ex6400 (same device)

EX6410 Firmware · NETGEAR

95%

v < 1.0.0.132

Affected range stops below 1.0.0.132, so it looks safe — our inference, not a vendor statement

netgear-ex6410 (same device)

EX6420 Firmware · NETGEAR

95%

v < 1.0.0.132

Affected range stops below 1.0.0.132, so it looks safe — our inference, not a vendor statement

netgear-ex6420 (same device)

EX7300 Firmware · NETGEAR

95%

v < 1.0.2.158

Affected range stops below 1.0.2.158, so it looks safe — our inference, not a vendor statement

netgear-ex7300 (same device)

EX7320 Firmware · NETGEAR

95%

v < 1.0.0.132

Affected range stops below 1.0.0.132, so it looks safe — our inference, not a vendor statement

netgear-ex7320 (same device)

EX7700 Firmware · NETGEAR

95%

v < 1.0.0.216

Affected range stops below 1.0.0.216, so it looks safe — our inference, not a vendor statement

netgear-ex7700 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://kb.netgear.com/000063778/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Extenders-Routers-and-WiFi-Systems-PSV-2020-0025

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://kb.netgear.com/000063778/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-Extenders-Routers-and-WiFi-Systems-PSV-2020-0025

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-77

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