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Vulnerability record · CVE-2020-9499 · published 9 April 2020

CVE-2020-9499: Dahuasecurity sd6al firmware classic buffer overflow vulnerability

Dahuasecurity · Sd6al Firmware

Some Dahua products have buffer overflow vulnerabilities. After the successful login of the legal account, the attacker sends a specific DDNS test command, which may cause the device to go down.

7.2 CVSS 3.1 High EPSS 1.5% · top 26.7% CWE-120 · Classic buffer overflow
7.2CVSS 3.1 base score, v2 6.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
19Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Some Dahua products have buffer overflow vulnerabilities. After the successful login of the legal account, the attacker sends a specific DDNS test command, which may cause the device to go down.

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

Affected products

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

References

LinkTags
https://www.dahuasecurity.com/support/cybersecurity/details/727 Vendor Advisory
https://www.dahuasecurity.com/support/cybersecurity/details/727 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-9499), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.