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Vulnerability record · CVE-2019-6258 · published 18 August 2020

CVE-2019-6258: D-link dir-822 firmware classic buffer overflow vulnerability

D Link · Dir 822 Firmware

D-Link DIR-822 Rev.Bx devices with firmware v.202KRb06 and older allow a buffer overflow via long MacAddress data in a /HNAP1/SetClientInfo HNAP protocol message, which is mishandled in /usr/sbin/udhcpd during reading of the /var/servd/LAN-1-udhcpd.conf file.

9.8 CVSS 3.1 Critical EPSS 2.6% · top 15.2% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score, v2 7.5
2.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

D-Link DIR-822 Rev.Bx devices with firmware v.202KRb06 and older allow a buffer overflow via long MacAddress data in a /HNAP1/SetClientInfo HNAP protocol message, which is mishandled in /usr/sbin/udhcpd during reading of the /var/servd/LAN-1-udhcpd.conf file.

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/pr0v3rbs/CVE/tree/master/CVE-2019-6258 ExploitThird Party Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10175 PatchVendor Advisory
https://github.com/pr0v3rbs/CVE/tree/master/CVE-2019-6258 ExploitThird Party Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10175 PatchVendor 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-2019-6258), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.