Is CVE-2018-21153 actively exploited?

No active exploitation of CVE-2018-21153 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2018-21153 be exploited remotely?

Yes. CVE-2018-21153 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2018-21153?

CVE-2018-21153 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2018-21153

CRITICAL

CVE-2018-21153

CWE-120Published: April 27, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D7800 before 1.0.1.34, DM200 before 1.0.0.50, EX2700 before 1.0.1.32, EX6100v2 before 1.0.1.70, EX6150v2 before 1.0.1.70, EX6200v2 before 1.0.1.62, EX6400 before 1.0.1.78, EX7300 before 1.0.1.62, EX8000 before 1.0.0.114, R6100 before 1.0.1.22, R7500 before 1.0.0.122, R7500v2 before 1.0.3.26, R7800 before 1.0.2.40, R8900 before 1.0.3.10, R9000 before 1.0.3.10, WN2000RPTv3 before 1.0.1.26, WN3000RPv2 before 1.0.0.56, WN3000RPv3 before 1.0.2.66, WN3100RPv2 before 1.0.0.56, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.54, WNDR4500v3 before 1.0.0.54, and WNR2000v5 before 1.0.0.64.

NVD Source

Technical Analysis

CVE-2018-21153 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.