CVE-2021-33044The identity authentication bypass vulnerability found in some Dahua products during the login process.
Updated under an hour ago ()
Does this affect you?
It affects dahuasecurity ipc-hum7xxx_firmware and 18 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Aug 21, 2024; federal agencies had to remediate by Sep 11, 2024. Treat that date as your deadline.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-287
- Known exploited
- Added to CISA KEV Aug 21, 2024; federal remediation due Sep 11, 2024Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 99.99% (percentile 100)
- Assigned by
- dahua
- NVD analysis
- Analyzed
- Record last updated
- Jan 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
dahuasecurity ipc-hum7xxx_firmware dahuasecurity:ipc-hum7xxx_firmware | before 2.820.0000000.5.r.210705 | NVD |
dahuasecurity ipc-hx3xxx_firmware dahuasecurity:ipc-hx3xxx_firmware | before 2.800.0000000.29.r.210630 | NVD |
dahuasecurity ipc-hx5xxx_firmware dahuasecurity:ipc-hx5xxx_firmware | before 2.820.0000000.18.r.210705 | NVD |
dahuasecurity sd1a1_firmware dahuasecurity:sd1a1_firmware | before 2.812.0000007.0.r.210706 | NVD |
dahuasecurity sd22_firmware dahuasecurity:sd22_firmware | before 2.812.0000007.0.r.210706 | NVD |
dahuasecurity sd49_firmware dahuasecurity:sd49_firmware | before 2.812.0000007.0.r.210706 | NVD |
dahuasecurity sd50_firmware dahuasecurity:sd50_firmware | before 2.812.0000007.0.r.210706 | NVD |
dahuasecurity sd52c_firmware dahuasecurity:sd52c_firmware | before 2.812.0000007.0.r.210706 | NVD |
dahuasecurity sd6al_firmware dahuasecurity:sd6al_firmware | before 2.812.0000007.0.r.210706 | NVD |
dahuasecurity tpc-bf1241_firmware dahuasecurity:tpc-bf1241_firmware | before 2.630.0000000.6.r.210707 | NVD |
dahuasecurity tpc-bf2221_firmware dahuasecurity:tpc-bf2221_firmware | before 2.630.0000000.10.r.210707 | NVD |
dahuasecurity tpc-bf5x01_firmware dahuasecurity:tpc-bf5x01_firmware | before 2.630.0000000.12.r.210707 | NVD |
dahuasecurity tpc-pt8x21b_firmware dahuasecurity:tpc-pt8x21b_firmware | before 2.630.0000000.10.r.210701 | NVD |
dahuasecurity tpc-sd2221_firmware dahuasecurity:tpc-sd2221_firmware | through 2.630.0000000.7.r.210707 | NVD |
dahuasecurity tpc-sd8x21_firmware dahuasecurity:tpc-sd8x21_firmware | before 2.630.0000000.9.r.210706 | NVD |
dahuasecurity vto-65xxx_firmware dahuasecurity:vto-65xxx_firmware | before 4.300.0000004.0.r.210715 | NVD |
dahuasecurity vto-75x95x_firmware dahuasecurity:vto-75x95x_firmware | before 4.300.0000003.0.r.210714 | NVD |
dahuasecurity vth-542xh_firmware dahuasecurity:vth-542xh_firmware | before 4.500.0000002.0.r.210715 | NVD |
dahuasecurity tpc-bf5x21_firmware dahuasecurity:tpc-bf5x21_firmware | before 2.630.0000000.8.r.210630 | NVD |
References
- https://www.dahuasecurity.com/support/cybersecurity/details/957x-refsource-misc, vendor-advisory
- http://seclists.org/fulldisclosure/2021/Oct/13mailing-list, x-refsource-fulldisc, exploit, third-party-advisory
- http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33044us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.