CVE-2025-47219Public exploitNetwork attack vector

Crash and memory disclosure via truncated stsd atoms

Published Aug 7, 2025 · Updated May 12, 2026

Out-of-bounds read in Siemens SIMATIC CN 4100 before V5.0 allows remote attackers to crash services or expose memory via crafted MP4 files. The embedded GStreamer qtdemux_parse_trak loop trusts an stsd entry count and reads each entry's size and type before confirming that enough bytes remain. No authentication or user interaction is required, but a truncated stsd atom must reach the MOV/MP4 demuxer.

CVSS severity8.1
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Siemens SIMATIC CN 4100 before V5.0 allows remote attackers to crash services or expose memory via crafted MP4 files. The embedded GStreamer qtdemux_parse_trak loop trusts an stsd entry count and reads each entry's size and type before confirming that enough bytes remain. No authentication or user interaction is required, but a truncated stsd atom must reach the MOV/MP4 demuxer.

The record

CVE
CVE-2025-47219
Published
Aug 7, 2025
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC CN 4100
Classifications
CWE-125, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 7, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <V5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · SIMATIC CN 4100version=0 <V5.0

Published CVSS scores

8.1Siemens ProductCERTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T0814Denial of Service

Public exploit references

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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