CVE-2018-21135 json
Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user.
published 2020-04-23 6 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13653
- cvss
- 6.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects R6700 before 1.0.1.48, R7500 before 1.0.0.124, R7800 before 1.0.2.58, R8900 before 1.0.4.2, R9000 before 1.0.4.2, WNDR3700v4 before 1.0.2.102, WNDR4300v1 before 1.0.2.104, WNDR4300v2 before 1.0.0.56, WNDR4500v3 before 1.0.0.56, and WNR2000v5-R2000 before 1.0.0.68.
Patch / fix
- netgear r6700_firmware 1.0.1.48
- netgear r7500_firmware 1.0.0.124
- netgear r7800_firmware 1.0.2.58
- netgear r8900_firmware 1.0.4.2
- netgear r9000_firmware 1.0.4.2
- netgear wndr3700_firmware 1.0.2.102
- netgear wndr4300_firmware 1.0.0.56, 1.0.2.104
- netgear wndr4500_firmware 1.0.0.56
- netgear wnr2000_firmware 1.0.0.68
Exploit prediction
1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 6.8 | CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N |
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.0 | 6.8 | CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
Sources
- CVE List CVE-2018-21135
- NVD CVE-2018-21135
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.