CVE-2021-33045
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National Vulnerability Database Information
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.
CVSS Base Score: 9.8 (v3.1)
The **CVSS Base Score** is a score from **0 to 10** that represents the intrinsic severity of a vulnerability. A higher score indicates greater severity.
0.02.55.07.510.0
Published on: 09/15/2021 22:15:10
Last modified: 11/10/2025 14:44:37
NIST: CVE source from the National Vulnerability Database (NVD)
CVSS Metrics Details
- Base Severity: CRITICAL
- Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector: NETWORK
- Attack Complexity: LOW
- Privileges Required: NONE
- User Interaction: NONE
- Scope: UNCHANGED
- Confidentiality Impact: HIGH
- Integrity Impact: HIGH
- Availability Impact: HIGH
Common Weakness Enumeration (CWE)
Database CWE: v4.18
Fonte: MITRE CWE
FIRST Information
EPSS Score: 0.9417
The **EPSS (Exploit Prediction Scoring System)** is a score from **0 to 1** that indicates the **probability** that a vulnerability will be exploited in the real world in the next 30 days. A higher value indicates a greater likelihood of exploitation.
0.00.250.50.751.0
Percentile: 0.9991
The **Percentile** indicates how much higher this vulnerability's EPSS score is compared to all other vulnerabilities in the EPSS database. For example, a percentile of 0.90 (90%) means that 90% of vulnerabilities have an EPSS score equal to or lower than the current one.
0.00.250.50.751.0
*Data updated as of: 2025-12-25
CISA Information (Known Exploited Vulnerabilities)
The **CISA KEV Catalog** lists vulnerabilities that have been **actively exploited in the real world**. If a CVE is present in this catalog, it indicates that the threat is immediate and mitigation should be a top priority.
CVE **CVE-2021-33045** **IS PRESENT** in the CISA KEV Catalog!
- Vulnerability Name: Dahua IP Camera Authentication Bypass Vulnerability
- Short Description: Dahua IP cameras and related products contain an authentication bypass vulnerability when the loopback device is specified by the client during authentication.
- Date Added to KEV: 08/21/2024
- Vendor/Product: Dahua / IP Camera Firmware
- Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Due Date: 09/11/2024
Articles published on Red Hot Cyber
Exploit PoC from GitHub
- bp2008/DahuaLoginBypass: Chrome extension that uses vulnerabilities CVE-2021-33044 and CVE-2021-33045 to log in to Dahua cameras without authentication.
- dongpohezui/cve-2021-33045:
- lequoca/Camera-Dahua-CVE-2021-33045:
- Alonzozzz/alonzzzo: Changelog CVE-2021-33044,CVE-2021-33045 Identity authentication bypass vulnerability found in some Dahua products CVE-2021-27248,CVE-2021-27249,CVE-2021-27250,CVE-2021-34860,CVE-2021-34861,CVE-2021-34862,CVE-2021-34863 Multiple vulnerabilities in DAP-2020 H/W rev. Ax with F/W v1.01 and below HTTP Path Traversal CVE-2019-7406 RCE vulnerability in TP-Link Wi-Fi Extenders via a malformed user agent field in HTTP headers CVE-2020-2501,CVE-2021-28797 Stack Buffer Overflow in QNAP Surveillance Station CVE-2021-34730 Critical UPnP Service Flaw on Cisco Small Business RV Series Routers CVE-2020-35785 Multiple HTTP authentication vulnerabilities on DGN2200v1
