CVE-2021-33045
Dahua IP Camera Authentication Bypass Vulnerability
Dahua IP Camera Firmware
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 21 August 2024. US federal agencies were required to remediate it by 11 September 2024.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 99.6%, which is higher than 99.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2021-33045 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2021-33045.
What does CVE-2021-33045 affect?
CVE-2021-33045 affects Dahua IP Camera Firmware. 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.
How severe is CVE-2021-33045?
CVE-2021-33045 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 99.6%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 11 September 2024.
How should organisations respond to CVE-2021-33045?
Apply the vendor patch for Dahua IP Camera Firmware as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.