# CVE-2024-3721: DVR-4216 - RCE

> Live exploitation tracking for CVE-2024-3721 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2024-3721

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 6.3
- **Public exploit available:** Yes
- **Affected products:** TBK DVR-4216
- **Weaknesses:** CWE-78 (Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'))
- **Tags:** iot

## Description

A vulnerability was found in TBK DVR-4104 and DVR-4216 up to 20240412 and classified as critical. This issue affects some unknown processing of the file /device.rsp?opt=sys&cmd=___S_O_S_T_R_E_A_MAX___. The manipulation of the argument mdb/mdc leads to os command injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-260573 was assigned to this vulnerability.

## CrowdSec analysis

[CVE-2024-3721](https://euvd.enisa.europa.eu/vulnerability/CVE-2024-3721) is a vulnerability found in certain TBK DVR devices that can allow remote attackers to perform OS command injection via crafted requests to a device management endpoint.

CrowdSec has been tracking this vulnerability and its exploits since 7th of May 2025.

CrowdSec has not observed any significant exploitation activity targeting CVE-2024-3721 across its network. As a result, no community-driven trend analysis is available for this vulnerability at this time.

Observed attack attempts typically involve requests to URLs containing `/device.rsp` with particular command parameters.

## Timeline

- 2024-04-13: CVE Published. CVE-2024-3721 is published to NVD.
- 2025-05-07: Rule Released. CrowdSec releases a rule to detect CVE-2024-3721 exploitation attempts against the CrowdSec Network.
- 2025-05-12: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2024-3721 for the first time.

## References

- https://vuldb.com/?id.260573
- https://vuldb.com/?submit.314969
- https://github.com/netsecfish/tbk_dvr_command_injection

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2024-3721) follows observed exploitation activity for CVE-2024-3721. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.