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Fencer Vulns
critical 9.6

CVE-2021-45506 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-2021-32272

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

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

Patch / fix

  • netgear cbr750_firmware 4.6.3.6
  • netgear rbk752_firmware 3.2.17.12
  • netgear rbr750_firmware 3.2.17.12
  • netgear rbs750_firmware 3.2.17.12
  • netgear rbk852_firmware 3.2.17.12
  • netgear rbr850_firmware 3.2.17.12
  • netgear rbs850_firmware 3.2.17.12

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% 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 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.8 AV:A/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.