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Fencer Intel
critical 9.6

CVE-2021-45638 json

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker.

published 4y ago modified 4mo ago also EUVD-2021-32404

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects D6220 before 1.0.0.68, D6400 before 1.0.0.102, D7000v2 before 1.0.0.74, D8500 before 1.0.3.60, DC112A before 1.0.0.56, R6300v2 before 1.0.4.50, R6400 before 1.0.1.68, R7000 before 1.0.11.116, R7100LG before 1.0.0.70, RBS40V before 2.6.2.8, RBW30 before 2.6.2.2, RS400 before 1.5.1.80, R7000P before 1.3.2.132, and R6900P before 1.3.2.132.

Patch / fix

  • netgear d6220_firmware 1.0.0.68
  • netgear d6400_firmware 1.0.0.102
  • netgear d7000v2_firmware 1.0.0.74
  • netgear d8500_firmware 1.0.3.60
  • netgear dc112a_firmware 1.0.0.56
  • netgear r6300v2_firmware 1.0.4.50
  • netgear r6400_firmware 1.0.1.68
  • netgear r7000_firmware 1.0.11.116
  • netgear r7100lg_firmware 1.0.0.70
  • netgear r7000p_firmware 1.3.2.132
  • netgear rbs40v_firmware 2.6.2.8
  • netgear rbw30_firmware 2.6.2.2
  • netgear rs400_firmware 1.5.1.80
  • netgear r6900p_firmware 1.3.2.132

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Exploit prediction

1.60% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-09).

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

Classification

Weakness

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.