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Vulnerability record · CVE-2022-30521 · published 2 June 2022

CVE-2022-30521: Dlink dir-890l firmware out-of-bounds write vulnerability

Dlink · Dir 890l Firmware

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.

9.8 CVSS 3.1 Critical EPSS 15% · top 3.4% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 10.0
15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/winmt/CVE/blob/main/DIR-890L/README.md ExploitThird Party Advisory
https://github.com/winmt/my-vuls/tree/main/DIR-890L
https://www.dlink.com/en/security-bulletin/ Vendor Advisory
https://github.com/winmt/CVE/blob/main/DIR-890L/README.md ExploitThird Party Advisory
https://github.com/winmt/my-vuls/tree/main/DIR-890L
https://www.dlink.com/en/security-bulletin/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-30521), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.