CVE-2021-33044 | BDVDB-2026-160952 Detail

Some Dahua IP Camera, Video Intercom, PTZ Dome Camera, Thermal Camera devices

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-287 Improper Authentication

References#

Exploit#

No public exploit known

History#

Version 12021-09-15Record published in the CVE List.
Version 22026-01-12Most recent update recorded in the CVE List.

Published

Published: 2021-09-15
Last modified: 2026-01-12

Vendor information

Vendor: Not stated
Product: Some Dahua IP Camera, Video Intercom, PTZ Dome Camera, Thermal Camera devices

Score

9.8 Critical

EPSS

99.9%, Very High

Estimated chance of exploitation in the next 30 days. EPSS percentile: 100.0.

KEV

Yes

Listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Systems

Vulnerable
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.
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.8 Critical

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).