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Vulnerabilities

Vulnerability · CVE-2026-31256

A null pointer dereference vulnerability exists in the RTSP service of the MERCURY MIPC252W 1.0.5 Build 230306 Rel.79931n.

Published Apr 27, 2026 · catalog updated Jun 17, 2026 · mipc252w firmware

Check if you run it

No confirmed exploitation is on record for CVE-2026-31256. EPSS is 0.49%. Act only if a listed version of mipc252w firmware is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.49%
Remediation
Not established
Affected products
cpe mercurycom/mipc252w firmware

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:// :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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mercurycom/mipc252w firmware1.0.5

How to fix CVE-2026-31256

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-31256. EPSS is 0.49%. Act only if a listed version of mipc252w firmware is installed.

Which versions are affected?

Compare what you have installed with mercurycom/mipc252w firmware 1.0.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-476: NULL Pointer Dereference. EPSS 0.49%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 27, 2026 · NIST NVD

    Detected

    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:// :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 e

  2. Jun 17, 2026 · NIST NVD

    Updated

    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:// :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 e

Sources

  • CVE.orgVulnerability recordCVE-2026-31256

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-31256

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-31256

    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:// :554/stream1/track2, the device fails to properly validate the Transport header field. When

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.