CVEs / CVE-2021-33044
CVE-2021-33044: Dahua IP Camera Authentication Bypass Vulnerability
- Known exploited in the CISA KEV catalog since 21 Aug 2024
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 99.9% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Dahua IP cameras and related products contain an authentication bypass vulnerability when the NetKeyboard type argument is specified by the client during authentication.
Description
The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a Some Dahua IP Camera, Video Intercom, PTZ Dome Camera, Thermal Camera devices | Dahua IP Camera devices IPC-HX3XXX, IPC-HX5XXX, and IPC-HUM7XXX, Video Intercom devices VTO75X95X, VTO65XXX, and VTH542XH, PTZ Dome Camera SD1A1, SD22, SD49, SD50, SD52C, and SD6AL, Thermal TPC-BF1241, TPC-BF2221, TPC-SD2221, TPC-BF5XXX, TPC-SD8X21, and TPC-PT8X21B devices Buildtime before June, 2021. | — |
Exploitation
| In CISA KEV since | 21 Aug 2024 |
|---|---|
| Due date for US federal agencies | 11 Sep 2024 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-287 |
References
- CVE-2021-33044 on NVD
- CVE-2021-33044 in the CISA KEV catalog
- https://www.dahuasecurity.com/aboutUs/trustedCenter/details/582 (cited by CISA)
- http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html Exploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2021/Oct/13 Exploit, Mailing List, Third Party Advisory
- https://www.dahuasecurity.com/support/cybersecurity/details/957 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33044 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.