What’s Vulnerable › Vulnerabilities

CVE-2021-45507

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-26 · updated 2026-06-17

Description

Certain NETGEAR devices are affected by authentication bypass. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBW30 before 2.6.2.2, RBK752 before 3.2.17.12, RBR750 before 3.2.17.12, RBS750 before 3.2.17.12, RBK852 before 3.2.17.12, RBR850 before 3.2.17.12, RBS850 before 3.2.17.12, and RBS40V before 2.6.2.8.

Affected products

• NETGEAR Cbr40 Firmware: before 2.5.0.24 — fixed in 2.5.0.24
• NETGEAR Cbr750 Firmware: before 4.6.3.6 — fixed in 4.6.3.6
• NETGEAR Rbk752 Firmware: before 3.2.17.12 — fixed in 3.2.17.12
• NETGEAR Rbk852 Firmware: before 3.2.17.12 — fixed in 3.2.17.12
• NETGEAR Rbr750 Firmware: before 3.2.17.12 — fixed in 3.2.17.12
• NETGEAR Rbr850 Firmware: before 3.2.17.12 — fixed in 3.2.17.12
• NETGEAR Rbs40V Firmware: before 2.6.2.8 — fixed in 2.6.2.8
• Netgear Orbi Satellite RBS750: before 3.2.17.12 — fixed in 3.2.17.12
• NETGEAR Rbs850 Firmware: before 3.2.17.12 — fixed in 3.2.17.12
• NETGEAR Rbw30 Firmware: before 2.6.2.2 — fixed in 2.6.2.2

How to fix

Upgrade to a fixed version: NETGEAR Cbr40 Firmware 2.5.0.24; NETGEAR Cbr750 Firmware 4.6.3.6; NETGEAR Rbk752 Firmware 3.2.17.12; NETGEAR Rbk852 Firmware 3.2.17.12; NETGEAR Rbr750 Firmware 3.2.17.12; NETGEAR Rbr850 Firmware 3.2.17.12; NETGEAR Rbs40V Firmware 2.6.2.8; Netgear Orbi Satellite RBS750 3.2.17.12; NETGEAR Rbs850 Firmware 3.2.17.12; NETGEAR Rbw30 Firmware 2.6.2.2. Check the vendor advisory for mitigations.

References

• https://kb.netgear.com/000064131/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0487
• https://kb.netgear.com/000064131/Security-Advisory-for-Authentication-Bypass-on-Some-WiFi-Systems-PSV-2020-0487

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