Is CVE-2021-34236 actively exploited?

No active exploitation of CVE-2021-34236 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-34236 be exploited remotely?

Yes. CVE-2021-34236 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-34236?

CVE-2021-34236 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-34236

CRITICAL

CVE-2021-34236

CWE-120Published: September 8, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Buffer Overflow in Netgear R8000 Router with firmware v1.0.4.56 allows remote attackers to execute arbitrary code or cause a denial-of-service by sending a crafted POST to '/bd_genie_create_account.cgi' with a sufficiently long parameter 'register_country'.

NVD Source

Technical Analysis

CVE-2021-34236 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.