CVE-2025-57440
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Blackmagic ATEM Mini Pro 2.7 exposes an undocumented Telnet service on TCP port 9993, which accepts unauthenticated plaintext commands for controlling streaming, recording, formatting storage devices, and system reboot. This interface, referred to as the "ATEM Ethernet Protocol 1.0", provides complete device control without requiring credentials or encryption. An attacker on the same network (or with remote access to the exposed port) can exploit this interface to execute arbitrary streaming commands, erase disks, or shut down the device - effectively gaining full remote control.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Blackmagic ATEM Mini Pro exposes an undocumented Telnet service on TCP port 9993 implementing the 'ATEM Ethernet Protocol 1.0'. This service accepts unauthenticated plaintext commands for streaming control, recording, storage formatting, and system reboot operations without any credentials or encryption, providing complete unauthenticated device control to any network attacker with port access.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify ATEM Mini Pro devices on the networkScan your network for devices with a manufacturer OUI matching Blackmagic Design (00:1D:50 or similar) or use network discovery tools to locate ATEM Mini Pro hardware by MAC address or hostname patterns.Affected if The device is a Blackmagic ATEM Mini Pro on the network.
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Check if TCP port 9993 is openRun a port scan against the suspected device using 'nmap -p 9993 <target_ip>' or equivalent network scanner to determine if port 9993 is listening.Affected if Port 9993 returns as open or filtered on the ATEM device.
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Verify the service accepts unauthenticated commandsConnect to port 9993 using a Telnet client ('telnet <target_ip> 9993') or netcat ('nc <target_ip> 9993') and attempt to send a basic protocol command such as 'CPw:' (connection password query) or any ATEM protocol command without providing credentials.Affected if The connection succeeds and returns protocol responses without requiring any authentication or password.
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Confirm streaming and recording control is exposedAfter connecting to port 9993, issue ATEM protocol commands such as 'STR;' (stream status query) or 'REC;' (record control) and observe whether the device accepts and processes these commands without credentials.Affected if The device accepts and executes streaming, recording, or formatting commands without authentication.
If you have an ATEM Mini Pro with port 9993 open that accepts ATEM protocol commands without requiring any password or authentication, your environment is affected by CVE-2025-57440.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataNetwork-level controls (firewall rules, VLAN segmentation, ACLs) should be deployed to restrict access to port 9993 to only trusted management hosts; if the Telnet service cannot be disabled, consider network isolation or replacing the device with a patched alternative.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-57440 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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