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Fencer Vulns
critical 9.6

CVE-2021-45504 json

Certain NETGEAR devices are affected by authentication bypass.

published 2021-12-26 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32270

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by authentication bypass. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBR852 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12.

Patch / fix

  • netgear cbr40_firmware 2.5.0.24
  • netgear cbr750_firmware 4.6.3.6
  • netgear rbr850_firmware 3.2.17.12
  • netgear rbr852_firmware 3.2.17.12
  • netgear rbs850_firmware 3.2.17.12

Exploit prediction

1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

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 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

References

Sources

Fencer Vulns 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.