CVE-2026-31256

HIGH

MERCURY MIPC252W 1.0.5 Build 230306 Rel.79931n - Denial of Service via RTSP SETUP Transport Header

Title source: llm

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.

References (1)

Core 1

Core References

https://github.com/izxnfirh8148/CVE_REQUESTS_references/blob/main/MERCURY_MIPC252W/MERCURY_MIPC252W_1th/README.md

View Writeup ZIP pw:eip

Scores

CVSS v3 7.5

EPSS 0.0041

EPSS Percentile 32.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-476

Status published

Products (1)

mercurycom/mipc252w_firmware 1.0.5 build_230306

Published Apr 27, 2026

Tracked Since Apr 28, 2026