CVE-2020-9502
Dahua
- Published
- 13 May 2020
- Last modified
- 17 June 2026
- CVSS
- 9.8 v3.1
- Severity
- critical
- EPSS
- 1.5% (72th pct)
- CISA KEV
- Not listed
- NVD status
- Modified
- Weaknesses
- CWE-330
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Exploitation
Not listed in the CISA Known Exploited Vulnerabilities catalogue as of 2026.09.04. That is an absence of confirmed public exploitation, not evidence that exploitation has not occurred. EPSS models a 1.5% probability of exploitation activity in the next 30 days.
Affected products
| Product | Vendor | Type | Versions named |
|---|---|---|---|
| Ipc-hdbw1320e-w | Dahua | IP camera | < 2019-12 |
| Ipc-hx2xxx | Dahua | IP camera | < 2019-12, <= 2021-7, >= 2017-7 |
| Ipc-hx5842h | Dahua | IP camera | < 2019-12 |
| Ipc-hx7842h | Dahua | IP camera | < 2019-12 |
| Ipc-hxxx5x4x | Dahua | IP camera | < 2019-12 |
| N42B1P | Dahua | unknown | < 2019-12 |
| N42B2P | Dahua | unknown | < 2019-12 |
| N42B3P | Dahua | unknown | < 2019-12 |
| N52A4P | Dahua | unknown | < 2019-12 |
| N52B2P | Dahua | unknown | < 2019-12 |
| N52B3P | Dahua | unknown | < 2019-12 |
| N52B5P | Dahua | unknown | < 2019-12 |
| N54A4P | Dahua | unknown | < 2019-12 |
| N54B2P | Dahua | unknown | < 2019-12 |
| PTZ1A | Dahua | IP camera | < 2019-12 |
| SD1A | Dahua | unknown | < 2019-12 |
| SD50 | Dahua | unknown | < 2.812.0000007.0.r.210706, < 2019-12, <= 2021-7, >= 2017-7 |
| SD52C | Dahua | unknown | < 2.812.0000007.0.r.210706, < 2019-12, <= 2021-7, >= 2017-7 |
| SD5A | Dahua | unknown | < 2019-12 |
| SD6AL | Dahua | unknown | < 2.812.0000007.0.r.210706, < 2019-12, <= 2021-7, >= 2017-7 |
References
Vendor advisory and patch
- https://www.dahuasecurity.com/support/cybersecurity/details/777
- https://www.dahuasecurity.com/support/cybersecurity/details/777
Record assembled from NVD, CISA KEV 2026.09.04 and FIRST EPSS 2026-09-04. Affected products are those NVD's CPE configuration names that fall inside this site's scope; a CVE may affect products outside it.