CVE-2021-33820
Last modified
CVE-2021-33820 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in UniFi Protect G3 FLEX Camera Version UVC.v4.30.0.67.Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted. Then the web server is denial-of-service.. EPSS estimates a 1.93% chance of exploitation in the next 30 days.
Description
An issue was discovered in UniFi Protect G3 FLEX Camera Version UVC.v4.30.0.67.Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted. Then the web server is denial-of-service.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ui | Camera G3 Flex Firmware | uvc.v4.30.0.67 |
References
- https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.mdExploit, Third Party Advisory
- https://linuxhint.com/hping3/Third Party Advisory
- https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-cameraProduct, Vendor Advisory
- https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.mdExploit, Third Party Advisory
- https://linuxhint.com/hping3/Third Party Advisory
- https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-cameraProduct, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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