Is CVE-2022-30521 actively exploited?

No active exploitation of CVE-2022-30521 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-30521 be exploited remotely?

Yes. CVE-2022-30521 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-30521?

CVE-2022-30521 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2022-30521

CRITICAL

CVE-2022-30521

CWE-787Published: June 2, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The LAN-side Web-Configuration Interface has Stack-based Buffer Overflow vulnerability in the D-Link Wi-Fi router firmware DIR-890L DIR890LA1_FW107b09.bin and previous versions. The function created at 0x17958 of /htdocs/cgibin will call sprintf without checking the length of strings in parameters given by HTTP header and can be controlled by users easily. The attackers can exploit the vulnerability to carry out arbitrary code by means of sending a specially constructed payload to port 49152.

NVD Source

Technical Analysis

CVE-2022-30521 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.