CVE-2021-45039
Uniview
- Published
- 31 May 2023
- Last modified
- 17 June 2026
- CVSS
- 9.8 v3.1
- Severity
- critical
- EPSS
- 4.2% (90th pct)
- CISA KEV
- Not listed
- NVD status
- Modified
- Weaknesses
- CWE-120
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
Multiple models of the Uniview IP Camera (e.g., IPC_G6103 B6103.16.10.B25.201218, IPC_G61, IPC21, IPC23, IPC32, IPC36, IPC62, and IPC_HCMN) offer an undocumented UDP service on port 7788 that allows a remote unauthenticated attacker to overflow an internal buffer and achieve code execution. By using this buffer overflow, a remote attacker can start the telnetd service. This service has a hardcoded default username and password (root/123456). Although it has a restrictive shell, this can be easily bypassed via the built-in ECHO shell command.
Exploitation
Not listed in the CISA Known Exploited Vulnerabilities catalogue as of 2026.09.04. That is an absence of confirmed public exploitation, not evidence that exploitation has not occurred. EPSS models a 4.2% probability of exploitation activity in the next 30 days, placing it in the top decile of all scored CVEs.
Affected products
| Product | Vendor | Type | Versions named |
|---|---|---|---|
| Camera | Uniview | IP camera | — |
References
Vendor advisory and patch
- https://www.uniview.com/About_Us/Security/Notice/202112/920471_140493_0.htm
- https://www.uniview.com/About_Us/Security/Notice/202112/920471_140493_0.htm
- https://ssd-disclosure.com/ssd-advisory--uniview-preauth-rce/ exploit
- https://ssd-disclosure.com/ssd-advisory--uniview-preauth-rce/ exploit
Record assembled from NVD, CISA KEV 2026.09.04 and FIRST EPSS 2026-09-04. Affected products are those NVD's CPE configuration names that fall inside this site's scope; a CVE may affect products outside it.