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Fencer Intel
medium 5.2

CVE-2021-45639 json

Certain NETGEAR devices are affected by reflected XSS.

published 4y ago modified 4mo ago also EUVD-2021-32405

cvss
5.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by reflected XSS. This affects CBR40 before 2.5.0.10, EAX20 before 1.0.0.32, EAX80 before 1.0.1.62, EX6120 before 1.0.0.64, EX6130 before 1.0.0.44, EX7000 before 1.0.1.104, EX7500 before 1.0.0.72, R7000 before 1.0.11.110, R7900 before 1.0.4.30, R7960P before 1.4.1.66, R8000 before 1.0.4.62, RAX200 before 1.0.2.102, XR300 before 1.0.3.50, EX3700 before 1.0.0.90, MR60 before 1.0.5.102, R7000P before 1.3.2.126, R8000P before 1.4.1.66, RAX20 before 1.0.1.64, RAX50 before 1.0.2.28, RAX80 before 1.0.3.102, EX3800 before 1.0.0.90, MS60 before 1.0.5.102, R6900P before 1.3.2.126, R7900P before 1.4.1.66, RAX15 before 1.0.1.64, RAX45 before 1.0.2.28, RAX75 before 1.0.3.102, RBR750 before 3.2.16.6, RBR850 before 3.2.16.6, RBS750 before 3.2.16.6, RBS850 before 3.2.16.6, RBK752 before 3.2.16.6, and RBK852 before 3.2.16.6.

Patch / fix

  • netgear cbr40_firmware 2.5.0.10
  • netgear eax20_firmware 1.0.0.32
  • netgear eax80_firmware 1.0.1.62
  • netgear ex6120_firmware 1.0.0.64
  • netgear ex6130_firmware 1.0.0.44
  • netgear ex7000_firmware 1.0.1.104
  • netgear ex7500_firmware 1.0.0.72
  • netgear r7000_firmware 1.0.11.110
  • netgear r7900_firmware 1.0.4.30
  • netgear r7960p_firmware 1.4.1.66
  • netgear r8000_firmware 1.0.4.62
  • netgear rax200_firmware 1.0.2.102
  • netgear xr300_firmware 1.0.3.50
  • netgear ex3700_firmware 1.0.0.90
  • netgear mr60_firmware 1.0.5.102
  • netgear r7000p_firmware 1.3.2.126
  • netgear r8000p_firmware 1.4.1.66
  • netgear rax20_firmware 1.0.1.64
  • netgear rax50_firmware 1.0.2.28
  • netgear rax80_firmware 1.0.3.102

Is CVE-2021-45639 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.2 CVSS:3.1/AC:L/AV:A/A:N/C:L/I:L/PR:N/S:C/UI:R
CNA 3.1 5.2 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/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.