CVE-2026-33000
CWE-20Published: May 22, 2026· Updated: May 22, 2026
Official Description
A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.
Risk Analysis
This critical vulnerability (CVSS 9.1) in UniFi OS devices allows a malicious actor with network access and high privileges to execute command injection. The flaw stems from improper input validation, which could lead to complete compromise of the device. This is a severe issue for network integrity.
No public exploit is currently known for this remotely exploitable vulnerability. While it requires high privileges, the low attack complexity means an attacker who gains initial access could easily escalate privileges.
Update UniFi OS devices to the latest firmware version that addresses the improper input validation. Implement strict access controls and monitor for unusual activity on UniFi OS devices.
Technical Analysis
CVE-2026-33000 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.1.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
CVSS v3.1 Vector Breakdown
Exploit & PoC Resources
All References (1)
Quick Facts
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-33000 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts