# CVE-2026-31256

> Vulnerability · severity: **HIGH** (CVSS 7.5).

## Description

A null pointer dereference vulnerability exists in the RTSP service of the MERCURY MIPC252W 1.0.5 Build 230306 Rel.79931n. During the processing of a SETUP request for the path rtsp://<IP>:554/stream1/track2, the device fails to properly validate the Transport header field. When this header is improperly constructed, the RTSP service can dereference a NULL pointer during request parsing. Successful exploitation causes the device to crash and automatically reboot.

## Key facts

- **CVE ID:** CVE-2026-31256
- **Published:** 2026-04-27
- **CVSS severity:** HIGH
- **CVSS base score:** 7.5
- **CWE codes:** CWE-476

## Affected products

- `mercurycom:mipc252w_firmware`
- `mercurycom:mipc252w`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31256

## Citation

> AI Analytics. CVE-2026-31256. Retrieved 2026-07-24 from https://api.ai-analytics.org/cve/CVE-2026-31256. Derived from NIST NVD. Licensed CC0.

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