What’s Vulnerable › Vulnerabilities
CVE-2021-45527
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-12-26 · updated 2026-06-17
- Weakness: CWE-120
Description
Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects D6220 before 1.0.0.68, D6400 before 1.0.0.102, D7000v2 before 1.0.0.66, D8500 before 1.0.3.58, DC112A before 1.0.0.54, EX7000 before 1.0.1.94, EX7500 before 1.0.0.72, R6250 before 1.0.4.48, R6300v2 before 1.0.4.52, R6400 before 1.0.1.70, R6400v2 before 1.0.4.102, R6700v3 before 1.0.4.102, R7000 before 1.0.11.116, R7100LG before 1.0.0.64, R7850 before 1.0.5.68, R7900 before 1.0.4.30, R7960P before 1.4.1.68, R8000 before 1.0.4.52, RAX200 before 1.0.2.88, RBS40V before 2.6.2.4, RS400 before 1.5.1.80, XR300 before 1.0.3.56, R7000P before 1.3.2.124, R8000P before 1.4.1.68, R8500 before 1.0.2.144, RAX80 before 1.0.3.102, R6900P before 1.3.2.124, R7900P before 1.4.1.68, R8300 before 1.0.2.144, RAX75 before 1.0.3.102, RBR750 before 3.2.17.12, RBR850 before 3.2.17.12, RBS750 before 3.2.17.12, RBS850 before 3.2.17.12, RBK752 before 3.2.17.12, and RBK852 before 3.2.17.12.
Affected products
- NETGEAR D6220 Firmware: before 1.0.0.68 — fixed in 1.0.0.68
- Netgear D6400: before 1.0.0.102 — fixed in 1.0.0.102
- NETGEAR D7000V2 Firmware: before 1.0.0.66 — fixed in 1.0.0.66
- NETGEAR D8500 Firmware: before 1.0.3.58 — fixed in 1.0.3.58
- NETGEAR Dc112A Firmware: before 1.0.0.54 — fixed in 1.0.0.54
- NETGEAR Ex7000 Firmware: before 1.0.1.94 — fixed in 1.0.1.94
- NETGEAR Ex7500 Firmware: before 1.0.0.72 — fixed in 1.0.0.72
- NETGEAR R6250 Firmware: before 1.0.4.48 — fixed in 1.0.4.48
- NETGEAR R6300V2 Firmware: before 1.0.4.52 — fixed in 1.0.4.52
- NETGEAR R6400 Firmware: before 1.0.1.70 — fixed in 1.0.1.70
- NETGEAR R6400V2 Firmware: before 1.0.4.102 — fixed in 1.0.4.102
- NETGEAR R6700V3 Firmware: before 1.0.4.102 — fixed in 1.0.4.102
- NETGEAR R6900P Firmware: before 1.3.2.124 — fixed in 1.3.2.124
- NETGEAR R7000: before 1.0.11.116 — fixed in 1.0.11.116
- NETGEAR R7000P: before 1.3.2.124 — fixed in 1.3.2.124
- NETGEAR R7100Lg Firmware: before 1.0.0.64 — fixed in 1.0.0.64
- NETGEAR R7850 Firmware: before 1.0.5.68 — fixed in 1.0.5.68
- NETGEAR R7900 Firmware: before 1.0.4.30 — fixed in 1.0.4.30
- NETGEAR R7900P Firmware: before 1.4.1.68 — fixed in 1.4.1.68
- NETGEAR R7960P Firmware: before 1.4.1.68 — fixed in 1.4.1.68
- NETGEAR R8000 Firmware: before 1.0.4.52 — fixed in 1.0.4.52
- NETGEAR R8000P Firmware: before 1.4.1.68 — fixed in 1.4.1.68
- NETGEAR R8300 Firmware: before 1.0.2.144 — fixed in 1.0.2.144
- NETGEAR R8500 Firmware: before 1.0.2.144 — fixed in 1.0.2.144
- NETGEAR Rax200 Firmware: before 1.0.2.88 — fixed in 1.0.2.88
- NETGEAR Rax75 Firmware: before 1.0.3.102 — fixed in 1.0.3.102
- NETGEAR Rax80 Firmware: before 1.0.3.102 — fixed in 1.0.3.102
- 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
How to fix
Upgrade to a fixed version: NETGEAR D6220 Firmware 1.0.0.68; Netgear D6400 1.0.0.102; NETGEAR D7000V2 Firmware 1.0.0.66; NETGEAR D8500 Firmware 1.0.3.58; NETGEAR Dc112A Firmware 1.0.0.54; NETGEAR Ex7000 Firmware 1.0.1.94; NETGEAR Ex7500 Firmware 1.0.0.72; NETGEAR R6250 Firmware 1.0.4.48; NETGEAR R6300V2 Firmware 1.0.4.52; NETGEAR R6400 Firmware 1.0.1.70; NETGEAR R6400V2 Firmware 1.0.4.102; NETGEAR R6700V3 Firmware 1.0.4.102. Check the vendor advisory for mitigations.
References
- https://kb.netgear.com/000064493/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-Extenders-and-WiFi-Systems-PSV-2020-0437
- https://kb.netgear.com/000064493/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-Extenders-and-WiFi-Systems-PSV-2020-0437
Get alerted when CVE-2021-45527 or the next vulnerability affects your stack