Skip to content
EXYS
Back to the CVEs

CVE-2021-33045

9.8, critical Known exploited

Dahua IP Camera Authentication Bypass Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
100% higher than 99.9% of scored CVEs
Exploitation
Confirmed in the wild
Published
15 Sept 20215 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 21 Aug 2024. US federal agencies had to remediate by 11 Sept 2024, a deadline that has passed.

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

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.

Details

Vendor
Dahua
Product
Some Dahua IP Camera, Video Intercom, NVR, XVR devices
Weakness
CWE-287 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
cybersecurity@dahuatech.com

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

References 4

Exploit code 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Dahua CVEs

Every Dahua CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2021-33044 Dahua IP Camera Authentication Bypass Vulnerability KEV EPSS 100% 9.8, critical

Beyond this page

Is CVE-2021-33045 in your network?

This page tells you how dangerous CVE-2021-33045 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2021-33045 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2021-33045 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.