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Vulnerability record · CVE-2020-9502 · published 13 May 2020

CVE-2020-9502: Dahuasecurity sd6al firmware vulnerability

Dahuasecurity · Sd6al Firmware

Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.

9.8 CVSS 3.1 Critical EPSS 1.5% · top 26.9% CWE-330 · CWE-330
9.8CVSS 3.1 base score, v2 7.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
20Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.

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

Affected products

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

References

LinkTags
https://www.dahuasecurity.com/support/cybersecurity/details/777 Vendor Advisory
https://www.dahuasecurity.com/support/cybersecurity/details/777 Vendor Advisory

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Related vulnerabilities

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

9.8CVE-2021-33046Dahuasecurity ipc-hx1xxx firmware improper authentication vulnerabilitySome Dahua products have access control vulnerability in the password reset process. Attackers can exploit this vulnerability through specific deploy…EPSS 1.3%8.1CVE-2019-9682Dahuasecurity sd6al firmware incorrect default permissions vulnerabilityDahua devices with Build time before December 2019 use strong security login mode by default, but in order to be compatible with the normal login of …EPSS 0.86%7.2CVE-2020-9499Dahuasecurity sd6al firmware classic buffer overflow vulnerabilitySome Dahua products have buffer overflow vulnerabilities. After the successful login of the legal account, the attacker sends a specific DDNS test co…EPSS 1.5%4.9CVE-2020-9500Dahuasecurity sd6al firmware vulnerabilitySome products of Dahua have Denial of Service vulnerabilities. After the successful login of the legal account, the attacker sends a specific log que…EPSS 1.0%

Source: NIST National Vulnerability Database (record CVE-2020-9502), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.