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Fencer Intel
medium 5.2

CVE-2017-18821 json

Certain NETGEAR devices are affected by stored XSS.

published 6y ago modified 4mo ago also EUVD-2017-9912

cvss
5.2
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by stored XSS. This affects M4300-28G before 12.0.2.15, M4300-52G before 12.0.2.15, M4300-28G-POE+ before 12.0.2.15, M4300-52G-POE+ before 12.0.2.15, M4300-8X8F before 12.0.2.15, M4300-12X12F before 12.0.2.15, M4300-24X24F before 12.0.2.15, M4300-24X before 12.0.2.15, M4300-48X before 12.0.2.15, and M4200 before 12.0.2.15.

Patch / fix

  • netgear m4300-28g_firmware 12.0.2.15
  • netgear m4300-52g_firmware 12.0.2.15
  • netgear m4300-28g-poe+_firmware 12.0.2.15
  • netgear m4300-52g-poe+_firmware 12.0.2.15
  • netgear m4300-8x8f_firmware 12.0.2.15
  • netgear m4300-12x12f_firmware 12.0.2.15
  • netgear m4300-24x24f_firmware 12.0.2.15
  • netgear m4300-24x_firmware 12.0.2.15
  • netgear m4300-48x_firmware 12.0.2.15
  • netgear m4200_firmware 12.0.2.15

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Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.2 CVSS:3.0/AC:L/AV:L/A:L/C:L/I:L/PR:H/S:C/UI:R
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CNA 3.0 5.2 CVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
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.