CVE-2021-33044

CRITICAL KEV NUCLEI

Dahua IPC-HUM7XXX IPC-HX3XXX IPC-HX5XXX SD1A1 SD22 SD49 SD50 SD52C SD6AL TPC-BF1241 Firmware Authentication Bypass

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2021-33044 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added August 21, 2024. EIP tracks 7 public exploits from researchers including bp2008, umair-aziz025, haingn. A Nuclei detection template is also available.

AI-analyzed exploit summary This repository contains functional exploit code for CVE-2021-33044, an authentication bypass vulnerability in Dahua cameras. The PoC overrides jQuery.extend to manipulate login parameters, allowing unauthorized access.

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.

Exploits (7)

nomisec WORKING POC 176 stars
by bp2008 · poc
https://github.com/bp2008/DahuaLoginBypass

This repository contains functional exploit code for CVE-2021-33044, an authentication bypass vulnerability in Dahua cameras. The PoC overrides jQuery.extend to manipulate login parameters, allowing unauthorized access.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: Dahua camera firmware (pre-Sept 2021)
No auth needed
Prerequisites: Access to Dahua camera login page · Browser extension environment (Chrome)
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 2 stars
by umair-aziz025 · remote
https://github.com/umair-aziz025/dahua-cve-research

This repository contains functional exploit code for CVE-2021-33044 and CVE-2021-33045, which are authentication bypass vulnerabilities in Dahua IP cameras. The scripts demonstrate the vulnerability by exploiting the RPC2 login mechanism with an empty password hash.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Dahua IP cameras (various models, firmware versions below 2.820.x for IPC and 4.001.x for NVR/XVR)
No auth needed
Prerequisites: Network access to the target device · Dahua IP camera with vulnerable firmware
devstral-2 · analyzed Mar 04, 2026 Full analysis →
nomisec WORKING POC 2 stars
by haingn · remote
https://github.com/haingn/LoHongCam-CVE-2021-33044

The repository contains a functional Python script that exploits an authentication bypass vulnerability (CVE-2021-33044) in Dahua IPC/VTH/VTO devices by sending a crafted JSON payload to the RPC2_Login endpoint, bypassing identity authentication.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Dahua IPC/VTH/VTO devices
No auth needed
Prerequisites: Network access to the target device · Target device running vulnerable Dahua firmware
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by Spy0x7 · poc
https://github.com/Spy0x7/CVE-2021-33044

The repository contains a functional Python script that exploits an authentication bypass vulnerability (CVE-2021-33044) in Dahua IPC/VTH/VTO devices by sending a crafted POST request to the RPC2_Login endpoint. The exploit checks for vulnerability by verifying the presence of 'true' in the response and saves the session token if successful.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Dahua IPC/VTH/VTO devices
No auth needed
Prerequisites: Network access to the target device · Python 3 environment with requests library
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by Bd-Mutant7 · poc
https://github.com/Bd-Mutant7/DahuaLoginBypass

This repository contains functional exploit code for CVE-2021-33044, an authentication bypass vulnerability in Dahua cameras. The PoC uses JavaScript to override jQuery.extend, manipulating login parameters to bypass authentication.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: Dahua cameras (firmware versions prior to September 2021)
No auth needed
Prerequisites: Access to the Dahua camera login page · Browser extension environment (e.g., Chrome extension)
devstral-2 · analyzed Apr 10, 2026 Full analysis →
nomisec WORKING POC
by eagle-nett · infoleak
https://github.com/eagle-nett/DAHUA_AUTH-BYPASS-CVE-2021-33044

This repository contains functional exploit code for CVE-2021-33044, an authentication bypass vulnerability in Dahua cameras/DVRs/NVRs. The PoC leverages a flaw in the challenge-response authentication mechanism, allowing attackers to bypass login by submitting an empty password hash.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Dahua Camera/DVR/NVR (multiple versions)
No auth needed
Prerequisites: network access to target device · RPC2_Login endpoint exposed
devstral-2 · analyzed Mar 24, 2026 Full analysis →
nomisec WORKING POC
by Baza-NATO · remote-auth
https://github.com/Baza-NATO/CVE-2021-33044

The repository contains a functional exploit for CVE-2021-33044, an authentication bypass vulnerability in Dahua IPC/VTH/VTO devices. The exploit sends a crafted JSON payload to the `/RPC2_Login` endpoint, bypassing authentication by manipulating the `password` and `userName` fields.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: Dahua IPC/VTH/VTO devices
No auth needed
Prerequisites: Network access to the target device · Target device running vulnerable Dahua firmware
devstral-2 · analyzed Feb 19, 2026 Full analysis →

Nuclei Templates (1)

Dahua IPC/VTH/VTO - Authentication Bypass
CRITICALby gy741

References (4)

Core 4
Core References
Exploit, Mailing List, Third Party Advisory mailing-list x_refsource_fulldisc
http://seclists.org/fulldisclosure/2021/Oct/13
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html

Scores

CVSS v3 9.8
EPSS 0.9427
EPSS Percentile 99.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable yes
Technical Impact total

Details

CISA KEV 2024-08-21
VulnCheck KEV 2023-12-05
InTheWild.io 2024-08-21
ENISA EUVD EUVD-2021-19759
CWE
CWE-287
Status published
Products (19)
dahuasecurity/ipc-hum7xxx_firmware < 2.820.0000000.5.r.210705
dahuasecurity/ipc-hx3xxx_firmware < 2.800.0000000.29.r.210630
dahuasecurity/ipc-hx5xxx_firmware < 2.820.0000000.18.r.210705
dahuasecurity/sd1a1_firmware < 2.812.0000007.0.r.210706
dahuasecurity/sd22_firmware < 2.812.0000007.0.r.210706
dahuasecurity/sd49_firmware < 2.812.0000007.0.r.210706
dahuasecurity/sd50_firmware < 2.812.0000007.0.r.210706
dahuasecurity/sd52c_firmware < 2.812.0000007.0.r.210706
dahuasecurity/sd6al_firmware < 2.812.0000007.0.r.210706
dahuasecurity/tpc-bf1241_firmware < 2.630.0000000.6.r.210707
... and 9 more
Published Sep 15, 2021
KEV Added Aug 21, 2024
Tracked Since Feb 18, 2026