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Fencer Vulns
critical 9.6

CVE-2021-45609 json

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

published 2021-12-26 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32375

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D8500 before 1.0.3.58, R6250 before 1.0.4.48, R7000 before 1.0.11.116, R7100LG before 1.0.0.64, R7900 before 1.0.4.38, R8300 before 1.0.2.144, R8500 before 1.0.2.144, XR300 before 1.0.3.68, R7000P before 1.3.2.132, and R6900P before 1.3.2.132.

Patch / fix

  • netgear d8500_firmware 1.0.3.58
  • netgear r6250_firmware 1.0.4.48
  • netgear r7000_firmware 1.0.11.116
  • netgear r7000p_firmware 1.3.2.132
  • netgear r6900p_firmware 1.3.2.132
  • netgear r7900_firmware 1.0.4.38
  • netgear r8300_firmware 1.0.2.144
  • netgear r8500_firmware 1.0.2.144
  • netgear r7100lg_firmware 1.0.0.64
  • netgear xr300_firmware 1.0.3.68

Exploit prediction

1.25% chance of exploitation in the next 30 days, higher than 69% 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 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
  • CWE-120 Buffer Copy without Checking Size of Input

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.