CVE-2018-21134

highpriority · track · 39EPSS 0.013 · 70 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.30% (70th) EPSS

CVSS 7.5 · high

Is it mine?

32 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects R6700 before 1.0.1.48, R7900 before 1.0.2.16, R6900 before 1.0.1.48, R7000P before 1.3.1.44, R6900P before 1.3.1.44, R6250 before 1.0.4.30, R6300v2 before 1.0.4.32, R6400 before 1.0.1.44, R6400v2 before 1.0.2.60, R7000 before 1.0.9.34, R7100LG before 1.0.0.48, R7300 before 1.0.0.68, R8000 before 1.0.4.18, R8000P before 1.4.1.24, R7900P before 1.4.1.24, R8500 before 1.0.2.122, R8300 before 1.0.2.122, WN2500RPv2 before 1.0.1.54, EX3700 before 1.0.0.72, EX3800 before 1.0.0.72, EX6000 before 1.0.0.32, EX6100 before 1.0.2.24, EX6120 before 1.0.0.42, EX6130 before 1.0.0.24, EX6150v1 before 1.0.0.42, EX6200 before 1.0.3.88, EX7000 before 1.0.0.66, D7000v2 before 1.0.0.51, D6220 before 1.0.0.46, D6400 before 1.0.0.82, and D8500 before 1.0.3.42.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.8–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.06.8mediumCVSS:3.0/AC:L/AV:A/A:L/C:H/I:L/PR:L/S:U/UI:Nsecondary · ENISA EU

v3.06.8mediumCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:Lsecondary · cve@mitre.org USexploitability 2.1 · impact 4.7

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimary

affected products (32)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
netgear d6220 firmware< 1.0.0.46nvdUScpe:2.3:o:netgear:d6220_firmware:*:*:*:*:*:*:*:*
netgear d6400 firmware< 1.0.0.82nvdUScpe:2.3:o:netgear:d6400_firmware:*:*:*:*:*:*:*:*
netgear d7000 firmware< 1.0.0.51nvdUScpe:2.3:o:netgear:d7000_firmware:*:*:*:*:*:*:*:*
netgear d8500 firmware< 1.0.3.42nvdUScpe:2.3:o:netgear:d8500_firmware:*:*:*:*:*:*:*:*
netgear ex3700 firmware< 1.0.0.72nvdUScpe:2.3:o:netgear:ex3700_firmware:*:*:*:*:*:*:*:*
netgear ex3800 firmware< 1.0.0.72nvdUScpe:2.3:o:netgear:ex3800_firmware:*:*:*:*:*:*:*:*
netgear ex6000 firmware< 1.0.0.32nvdUScpe:2.3:o:netgear:ex6000_firmware:*:*:*:*:*:*:*:*
netgear ex6100 firmware< 1.0.2.24nvdUScpe:2.3:o:netgear:ex6100_firmware:*:*:*:*:*:*:*:*
netgear ex6120 firmware< 1.0.0.42nvdUScpe:2.3:o:netgear:ex6120_firmware:*:*:*:*:*:*:*:*
netgear ex6130 firmware< 1.0.0.24nvdUScpe:2.3:o:netgear:ex6130_firmware:*:*:*:*:*:*:*:*
netgear ex6150 firmware< 1.0.0.42nvdUScpe:2.3:o:netgear:ex6150_firmware:*:*:*:*:*:*:*:*
netgear ex6200 firmware< 1.0.3.88nvdUScpe:2.3:o:netgear:ex6200_firmware:*:*:*:*:*:*:*:*
netgear ex7000 firmware< 1.0.0.66nvdUScpe:2.3:o:netgear:ex7000_firmware:*:*:*:*:*:*:*:*
netgear r6250 firmware< 1.0.4.30nvdUScpe:2.3:o:netgear:r6250_firmware:*:*:*:*:*:*:*:*
netgear r6300 firmware< 1.0.4.32nvdUScpe:2.3:o:netgear:r6300_firmware:*:*:*:*:*:*:*:*
netgear r6400 firmware< 1.0.1.44nvdUScpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
netgear r6400 firmware< 1.0.2.60nvdUScpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
netgear r6700 firmware< 1.0.1.48nvdUScpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*
netgear r6900 firmware< 1.0.1.48nvdUScpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*

showing 20 of 32

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2020-04-23modified 2026-06-17

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+16120 more

references (4)

External citations — patches, advisories, analysis.

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