CVE-2018-21211 json
Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker.
published 2020-04-28 6 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13729
- cvss
- 8.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D3600 before 1.0.0.67, D6000 before 1.0.0.67, D6100 before 1.0.0.56, D7800 before 1.0.1.30, R7500 before 1.0.0.118, R7500v2 before 1.0.3.24, R7800 before 1.0.2.40, R9000 before 1.0.2.52, WNDR3700v4 before 1.0.2.96, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.50, WNDR4500v3 before 1.0.0.50, and WNR2000v5 before 1.0.0.62.
Patch / fix
- netgear d3600_firmware 1.0.0.67
- netgear d6000_firmware 1.0.0.67
- netgear d6100_firmware 1.0.0.56
- netgear d7800_firmware 1.0.1.30
- netgear r7500_firmware 1.0.0.118, 1.0.3.24
- netgear r7800_firmware 1.0.2.40
- netgear r9000_firmware 1.0.2.52
- netgear wndr3700_firmware 1.0.2.96
- netgear wndr4300_firmware 1.0.0.50, 1.0.2.98
- netgear wndr4500_firmware 1.0.0.50
- netgear wnr2000_firmware 1.0.0.62
Exploit prediction
0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 8.8 | CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.0 | 8.8 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 5.8 | AV:A/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-120 Buffer Copy without Checking Size of Input
References
Sources
- CVE List CVE-2018-21211
- NVD CVE-2018-21211
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.