CVE-2026-31256: A null pointer dereference vulnerability exists in the RTSP service of the MERCURY MIPC252W 1.0.5 Build 230306

This week

HIGH 7.5REMOTEMITIGATE

CVE-2026-31256 is a high-severity flaw (CVSS 7.5) affecting mipc252w firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 auto

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-04-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mercurycom

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-27 19:16 UTCPublished CVE record published
2026-06-17 10:33 UTCUpdated Record last modified

mercurycom mipc252w firmware MITIGATE

Affected: 1.0.5 build_230306

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.5

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-31256?

mipc252w firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-31256 being exploited?

CVE-2026-31256 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-31256 affect?

CVE-2026-31256 affects mipc252w firmware. Severity is high (CVSS 7.5). 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 va

How urgent is CVE-2026-31256?

Priority 45/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-35903 CRITICAL 9.8 MITIGATE MERCURY MIPC252W IP camera 1.0.5 Build 230306 Rel.79931n contains an improper authentication vulnerability in
CVE-2026-35902 MEDIUM 6.2 MITIGATE The RTSP service of MERCURY IP camera MIPC252W 1.0.5 Build 230306 has an issue handling failed Digest authenti
CVE-2026-35901 MEDIUM 4.4 MITIGATE A handling issue in the RTSP service of the Mercury MIPC252W 1.0.5 Build 230306 Rel.79931n allows an authentic

References

← Back to latest CVEs