CVE-2018-21170

What it is

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects EX2700 before 1.0.1.28, R7800 before 1.0.2.40, WN2000RPTv3 before 1.0.1.20, WN3000RPv3 before 1.0.2.50, and WN3100RPv2 before 1.0.0.56.

At a glance

Exploitability

Can be exploited from the same network segment without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2020-04-27 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:54 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.7% in the next 30 days (EPSS).
• Severity: 8.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2020-04-27 18:15 UTC

Last modified

2026-06-17 01:54 UTC

Exploit probability

0.7% · EPSS, next 30 days

Weakness

CWE-787 · Out-of-bounds write

Record status

Modified

Affected

• Netgear r7800 Firmware < 1.0.2.40
• Netgear ex2700 Firmware < 1.0.1.28
• Netgear wn2000rpt Firmware < 1.0.1.20
• Netgear wn3000rp Firmware < 1.0.2.50
• Netgear wn3100rp Firmware < 1.0.0.56

Attack profile CVSS 3.1 · 8.8

Attack vector

Adjacent network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-21170.md and follow it. Check whether this project is affected by CVE-2018-21170. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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