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Fencer Intel
critical 9.6

CVE-2021-45621 json

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker.

published 4y ago modified 4mo ago also EUVD-2021-32387

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects CBR40 before 2.5.0.24, CBR750 before 3.2.18.2, EAX20 before 1.0.0.58, EAX80 before 1.0.1.68, EX3700 before 1.0.0.94, EX3800 before 1.0.0.94, EX6120 before 1.0.0.64, EX6130 before 1.0.0.44, EX7000 before 1.0.1.104, EX7500 before 1.0.0.74, LAX20 before 1.1.6.28, MR60 before 1.0.6.116, MS60 before 1.0.6.116, R6300v2 before 1.0.4.52, R6400 before 1.0.1.70, R6400v2 before 1.0.4.106, R6700v3 before 1.0.4.106, R6900P before 1.3.3.140, R7000 before 1.0.11.126, R7000P before 1.3.3.140, R7100LG before 1.0.0.72, R7850 before 1.0.5.74, R7900 before 1.0.4.46, R7900P before 1.4.2.84, R7960P before 1.4.2.84, R8000 before 1.0.4.74, R8000P before 1.4.2.84, R8300 before 1.0.2.154, R8500 before 1.0.2.154, RAX15 before 1.0.3.96, RAX20 before 1.0.3.96, RAX200 before 1.0.4.120, RAX35v2 before 1.0.3.96, RAX40v2 before 1.0.3.96, RAX43 before 1.0.3.96, RAX45 before 1.0.3.96, RAX50 before 1.0.3.96, RAX75 before 1.0.4.120, RAX80 before 1.0.4.120, RBK752 before 3.2.17.12, RBK852 before 3.2.17.12, RBK852 before 3.2.17.12, RBR750 before 3.2.17.12, RBR850 before 3.2.17.12, RBR850 before 3.2.17.12, RBS750 before 3.2.17.12, RBS850 before 3.2.17.12, RBS850 before 3.2.17.12, RS400 before 1.5.1.80, XR1000 before 1.0.0.58, and XR300 before 1.0.3.68.

Patch / fix

  • netgear cbr40_firmware 2.5.0.24
  • netgear cbr750_firmware 3.2.18.2
  • netgear eax20_firmware 1.0.0.58
  • netgear eax80_firmware 1.0.1.68
  • netgear rax15_firmware 1.0.3.96
  • netgear rax20_firmware 1.0.3.96
  • netgear rax200_firmware 1.0.4.120
  • netgear rax35v2_firmware 1.0.3.96
  • netgear rax40v2_firmware 1.0.3.96
  • netgear rax43_firmware 1.0.3.96
  • netgear rax45_firmware 1.0.3.96
  • netgear rax50_firmware 1.0.3.96
  • netgear rax75_firmware 1.0.4.120
  • netgear rax80_firmware 1.0.4.120
  • 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 rbs750_firmware 3.2.17.12
  • netgear rbs850_firmware 3.2.17.12

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Exploit prediction

2.04% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 9.6 CVSS:3.1/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:C/UI:N
CNA 3.1 9.6 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.