CVE-2021-33551: Geutebrück and UDP Technology IP cameras command injection

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 20 September 2026. Confidence: medium.

high priorityRemote code execution with high EPSS and a public exploit reference, though exploitation requires high privileges and no KEV listing exists.

What it is

Multiple camera devices from UDP Technology, Geutebrück and other vendors contain an OS command injection flaw (CWE-78) that can allow remote arbitrary code execution. The vulnerability affects a broad set of G-Cam and G-Code firmware models, so unpatched cameras on a network are exposed to full compromise. The record does not specify the exact vulnerable firmware versions.

Impact

An attacker who can reach the affected interface and authenticate with high privileges can execute arbitrary OS commands, gaining full control of the camera with high impact to confidentiality, integrity and availability.

Attack surface

The flaw is network-reachable (AV:N) with no user interaction (UI:N), but the CVSS vector requires high privileges (PR:H), meaning an attacker needs valid administrative credentials or equivalent access to the device interface.

Exploitation

No CISA KEV listing and no documented ransomware use, but EPSS is very high (0.488, 98.8th percentile) and public references include an exploit-tagged writeup, indicating meaningful real-world exploitation risk.

What to do

• Apply the vendor firmware updates referenced in CISA ICS advisory ICSA-21-208-03 as soon as they are available for each affected model.
• Isolate cameras on a dedicated VLAN or network segment with no direct internet exposure and restrict management access to trusted hosts.
• Change default and weak administrative credentials, enforce strong unique passwords, and disable unused services or remote management interfaces.
• Monitor vendor and CISA advisories for updated firmware since the record does not list fixed versions.
• Where patching is not possible, place affected cameras behind a firewall or reverse proxy that filters management traffic.

Detection

• Monitor camera and management logs for unexpected command execution, shell activity, or abnormal process spawning on the device.
• Alert on authentication events to camera management interfaces from unusual source IPs or outside expected administrative networks.
• Inspect network traffic to camera management ports for injection-style payloads or anomalous HTTP requests.
• Baseline normal camera behavior and flag configuration changes, new accounts, or outbound connections from camera devices.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.