# CVE-2024-0840

## Summary

- **CVE ID:** CVE-2024-0840
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-141
- **Published:** Apr 29, 2024
- **Last Modified:** Mar 13, 2026

## Description

The Grandstream UCM Series IP PBX before firmware version 1.0.20.52 is affected by a parameter injection vulnerability in the HTTP interface. A remote and authenticated attacker can execute arbitrary code by sending a crafted HTTP request. Authentication may be possible using a default user and password. Affected models are the UCM6202, UCM6204, UCM6208, and UCM6510.

## Affected Products

- Grandstream — UCM Series (0)

## References

- [CNA](https://vulncheck.com/advisories/grand-stream-param-injection)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.88%
- **EPSS Percentile:** 56.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._