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Fencer Intel
medium 6.5

CVE-2021-45666 json

Certain NETGEAR devices are affected by stored XSS.

published 4y ago modified 4mo ago also EUVD-2021-32432

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by stored XSS. This affects CBR40 before 2.5.0.10, EAX80 before 1.0.1.64, EX3700 before 1.0.0.90, EX3800 before 1.0.0.90, EX6120 before 1.0.0.64, EX6130 before 1.0.0.44, EX7500 before 1.0.0.72, RBW30 before 2.6.1.4, RBK752 before 3.2.16.6, RBR750 before 3.2.16.6, RBS750 before 3.2.16.6, RBK852 before 3.2.16.6, RBR850 before 3.2.16.6, RBS850 before 3.2.16.6, and RBS40V before 2.6.1.4.

Patch / fix

  • netgear eax80_firmware 1.0.1.64
  • netgear ex3700_firmware 1.0.0.90
  • netgear ex3800_firmware 1.0.0.90
  • netgear ex6120_firmware 1.0.0.64
  • netgear ex6130_firmware 1.0.0.44
  • netgear ex7500_firmware 1.0.0.72
  • netgear rbw30_firmware 2.6.1.4
  • netgear rbk752_firmware 3.2.16.6
  • netgear rbr750_firmware 3.2.16.6
  • netgear rbs750_firmware 3.2.16.6
  • netgear rbk852_firmware 3.2.16.6
  • netgear rbr850_firmware 3.2.16.6
  • netgear rbs850_firmware 3.2.16.6
  • netgear rbs40v_firmware 2.6.1.4
  • netgear cbr40_firmware 2.5.0.10

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Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AC:H/AV:A/A:L/C:L/I:H/PR:H/S:C/UI:R
CNA 3.1 6.5 CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

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.