Is CVE-2018-21097 actively exploited?

No active exploitation of CVE-2018-21097 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-21097 be exploited remotely?

Yes. CVE-2018-21097 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-21097?

CVE-2018-21097 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2018-21097

CWE-787Published: April 27, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects WAC505 before 5.0.5.4, WAC510 before 5.0.5.4, WAC120 before 2.1.7, WN604 before 3.3.10, WNAP320 before 3.7.11.4, WNAP210v2 before 3.7.11.4, WNDAP350 before 3.7.11.4, WNDAP360 before 3.7.11.4, WNDAP660 before 3.7.11.4, WNDAP620 before 2.1.7, and WND930 before 2.1.5.

NVD Source

Technical Analysis

CVE-2018-21097 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.