CVE-2021-33045
KEVDahua IP Camera Authentication Bypass Vulnerability
Description
Dahua IP cameras and related products contain an authentication bypass vulnerability when the loopback device is specified by the client during authentication.
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 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HPublishedSep 15, 2021
Last modifiedJun 17, 2026
Added to KEVAug 21, 2024
Remediation dueSep 11, 2024
References
- packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.htmlExploitThird Party Advisory
- seclists.org/fulldisclosure/2021/Oct/13ExploitMailing List
- dahuasecurity.com/support/cybersecurity/details/957Vendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33045US Government Resource
0 recent articles mention this CVE
89
Risk assessment · Critical
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 775 days
- CVSS
- 9.8 CRITICAL
- EPSS (30-day exploit probability)
- 99.6% · top 1% of all CVEs
- Weakness
- CWE-287
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
Recommended actions
- 1.Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.