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Fencer Intel
high 8.3

CVE-2021-45637 json

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

published 4y ago modified 4mo ago also EUVD-2021-32403

cvss
8.3
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 stack-based buffer overflow by an unauthenticated attacker. This affects R6260 before 1.1.0.76, R6800 before 1.2.0.62, R6700v2 before 1.2.0.62, R6900v2 before 1.2.0.62, R7450 before 1.2.0.62, AC2100 before 1.2.0.62, AC2400 before 1.2.0.62, and AC2600 before 1.2.0.62.

Patch / fix

  • netgear r6260_firmware 1.1.0.76
  • netgear r6800_firmware 1.2.0.62
  • netgear r6700v2_firmware 1.2.0.62
  • netgear r6900v2_firmware 1.2.0.62
  • netgear r7450_firmware 1.2.0.62
  • netgear ac2100_firmware 1.2.0.62
  • netgear ac2400_firmware 1.2.0.62
  • netgear ac2600_firmware 1.2.0.62

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Exploit prediction

1.24% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.3 CVSS:3.1/AC:L/AV:A/A:L/C:H/I:H/PR:N/S:U/UI:N
CNA 3.1 8.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
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.