CVE-2021-38527

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-11 · updated 2026-06-17
Weakness: CWE-77

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 products

NETGEAR Cbr40 Firmware: before 2.5.0.14 — fixed in 2.5.0.14
Netgear EX6100: before 1.0.1.98 — fixed in 1.0.1.98
Netgear EX6150: before 1.0.1.98 — fixed in 1.0.1.98
NETGEAR Ex6250 Firmware: before 1.0.0.132 — fixed in 1.0.0.132
NETGEAR Ex6400 Firmware: before 1.0.2.158; before 1.0.0.132 — fixed in 1.0.0.132, 1.0.2.158
NETGEAR Ex6410 Firmware: before 1.0.0.132 — fixed in 1.0.0.132
NETGEAR Ex6420 Firmware: before 1.0.0.132 — fixed in 1.0.0.132
NETGEAR Ex7300 Firmware: before 1.0.2.158 — fixed in 1.0.2.158
NETGEAR Ex7320 Firmware: before 1.0.0.132 — fixed in 1.0.0.132
NETGEAR Ex7700 Firmware: before 1.0.0.216 — fixed in 1.0.0.216
NETGEAR Ex8000 Firmware: before 1.0.1.232 — fixed in 1.0.1.232
NETGEAR R7800 Firmware: before 1.0.2.78 — fixed in 1.0.2.78
NETGEAR Rbk12 Firmware: before 2.6.1.44 — fixed in 2.6.1.44
NETGEAR Rbk20 Firmware: before 2.6.1.38 — fixed in 2.6.1.38
NETGEAR Rbk40 Firmware: before 2.6.1.38 — fixed in 2.6.1.38
NETGEAR Rbk50 Firmware: before 2.6.1.40 — fixed in 2.6.1.40
NETGEAR Rbk752 Firmware: before 3.2.16.6 — fixed in 3.2.16.6
NETGEAR Rbk852 Firmware: before 3.2.16.6 — fixed in 3.2.16.6
NETGEAR Rbr10 Firmware: before 2.6.1.44 — fixed in 2.6.1.44
NETGEAR Rbr20 Firmware: before 2.6.1.36 — fixed in 2.6.1.36
NETGEAR Rbr40 Firmware: before 2.6.1.36 — fixed in 2.6.1.36
NETGEAR Rbr50 Firmware: before 2.6.1.40 — fixed in 2.6.1.40
NETGEAR Rbr750 Firmware: before 3.2.16.6 — fixed in 3.2.16.6
NETGEAR Rbr850 Firmware: before 3.2.16.6 — fixed in 3.2.16.6
NETGEAR Rbs10 Firmware: before 2.6.1.44 — fixed in 2.6.1.44
NETGEAR Rbs20 Firmware: before 2.6.1.38 — fixed in 2.6.1.38
NETGEAR Rbs40 Firmware: before 2.6.1.38 — fixed in 2.6.1.38
NETGEAR Rbs40V Firmware: before 2.6.2.4 — fixed in 2.6.2.4
NETGEAR Rbs50 Firmware: before 2.6.1.40 — fixed in 2.6.1.40
NETGEAR Rbs50Y Firmware: before 2.6.1.40 — fixed in 2.6.1.40

How to fix

Upgrade to a fixed version: NETGEAR Cbr40 Firmware 2.5.0.14; Netgear EX6100 1.0.1.98; Netgear EX6150 1.0.1.98; NETGEAR Ex6250 Firmware 1.0.0.132; NETGEAR Ex6400 Firmware 1.0.0.132, 1.0.2.158; NETGEAR Ex6410 Firmware 1.0.0.132; NETGEAR Ex6420 Firmware 1.0.0.132; NETGEAR Ex7300 Firmware 1.0.2.158; NETGEAR Ex7320 Firmware 1.0.0.132; NETGEAR Ex7700 Firmware 1.0.0.216; NETGEAR Ex8000 Firmware 1.0.1.232; NETGEAR R7800 Firmware 1.0.2.78. Check the vendor advisory for mitigations.

References

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