CVE-2026-31256Network attack vector

Unauthenticated reboot via malformed RTSP Transport header

Published Apr 27, 2026 · Updated Apr 27, 2026

A null pointer dereference in the MERCURY MIPC252W 1.0.5 Build 230306 Rel.79931n RTSP service allows remote attackers to reboot the device. The SETUP request parser fails to validate a malformed Transport header for /stream1/track2 and dereferences a NULL pointer. Unauthenticated network access to RTSP port 554 is sufficient; exploitation crashes the service and automatically reboots the camera.

CVSS severity7.5
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A null pointer dereference in the MERCURY MIPC252W 1.0.5 Build 230306 Rel.79931n RTSP service allows remote attackers to reboot the device. The SETUP request parser fails to validate a malformed Transport header for /stream1/track2 and dereferences a NULL pointer. Unauthenticated network access to RTSP port 554 is sufficient; exploitation crashes the service and automatically reboots the camera.

The record

CVE
CVE-2026-31256
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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