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Fencer Intel
high 7.1

CVE-2021-45656 json

Certain NETGEAR devices are affected by server-side injection.

published 4y ago modified 4mo ago also EUVD-2021-32422

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

Certain NETGEAR devices are affected by server-side injection. This affects D6200 before 1.1.00.38, D7000 before 1.0.1.78, R6020 before 1.0.0.48, R6080 before 1.0.0.48, R6050 before 1.0.1.26, JR6150 before 1.0.1.26, R6120 before 1.0.0.66, R6220 before 1.1.0.100, R6230 before 1.1.0.100, R6260 before 1.1.0.78, R6800 before 1.2.0.76, R6900v2 before 1.2.0.76, R6700v2 before 1.2.0.76, R7450 before 1.2.0.76, AC2100 before 1.2.0.76, AC2400 before 1.2.0.76, AC2600 before 1.2.0.76, RBK40 before 2.5.1.16, RBR40 before 2.5.1.16, RBS40 before 2.5.1.16, RBK20 before 2.5.1.16, RBR20 before 2.5.1.16, RBS20 before 2.5.1.16, RBK50 before 2.5.1.16, RBR50 before 2.5.1.16, RBS50 before 2.5.1.16, and RBS50Y before 2.6.1.40.

Patch / fix

  • netgear d6200_firmware 1.1.00.38
  • netgear d7000_firmware 1.0.1.78
  • netgear r6020_firmware 1.0.0.48
  • netgear r6080_firmware 1.0.0.48
  • netgear r6050_firmware 1.0.1.26
  • netgear jr6150_firmware 1.0.1.26
  • netgear r6120_firmware 1.0.0.66
  • netgear r6220_firmware 1.1.0.100
  • netgear r6230_firmware 1.1.0.110
  • netgear r6260_firmware 1.1.0.78
  • netgear r6800_firmware 1.2.0.76
  • netgear r6900_firmware 1.2.0.76
  • netgear r6700_firmware 1.2.0.76
  • netgear r7450_firmware 1.2.0.76
  • netgear ac2100_firmware 1.2.0.76
  • netgear ac2400_firmware 1.2.0.76
  • netgear ac2600_firmware 1.2.0.76
  • netgear rbk40_firmware 2.5.1.16
  • netgear rbr40_firmware 2.5.1.16
  • netgear rbs40_firmware 2.5.1.16

Is CVE-2021-45656 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

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AC:L/AV:L/A:N/C:H/I:H/PR:L/S:U/UI:N
CNA 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

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.