Auth bypass in Dahuasecurity Ipc-Hum7xxx
CVE-2021-33045
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.996 (99.9th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.996 · newest: 0.996 · change: +0.000
Affected products
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- www.dahuasecurity.com/support/cybersecurity/details/957 (Vendor Advisory)
- seclists.org/fulldisclosure/2021/Oct/13 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html (Exploit, VDB Entry, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-33045?
- CVE-2021-33045 is a critical-severity vulnerability in Dahuasecurity Ipc-Hum7xxx, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-09-15.
- How severe is CVE-2021-33045?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-33045 known to be exploited?
- Yes. CVE-2021-33045 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-08-21), indicating it is being actively exploited. 39 public proof-of-concept repositories are indexed.