CVE-2018-21135
7.2 · HIGHOverview
CVE-2018-21135 is a high-severity vulnerability affecting netgear r6700_firmware. It was published on April 23, 2020 and has a CVSS 3.1 base score of 7.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from netgear. Update r6700_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| netgear | r6700_firmware | >= 0, < 1.0.1.48 | Affected |
| netgear | r7500_firmware | >= 0, < 1.0.0.124 | Affected |
| netgear | r7800_firmware | >= 0, < 1.0.2.58 | Affected |
| netgear | r8900_firmware | >= 0, < 1.0.4.2 | Affected |
| netgear | r9000_firmware | >= 0, < 1.0.4.2 | Affected |
| netgear | wndr3700_firmware | >= 0, < 1.0.2.102 | Affected |
| netgear | wndr4300_firmware | >= 0, < 1.0.2.104 | Affected |
| netgear | wndr4500_firmware | >= 0, < 1.0.0.56 | Affected |
| netgear | wnr2000_firmware | >= 0, < 1.0.0.68 | Affected |
Frequently Asked Questions
What is CVE-2018-21135?
CVE-2018-21135 is a high-severity vulnerability affecting netgear r6700_firmware. It was published on April 23, 2020 and has a CVSS 3.1 base score of 7.2 (HIGH).
How severe is CVE-2018-21135?
This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2018-21135?
Check the references section for vendor advisories and patches from netgear. Update r6700_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-21135?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-21135 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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