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Sprecon E C FirmwareOperating system · Sprecher Automation

CVE-2025-41742

CRITICAL · 9.8 CVSS v3.1 Published 2025-12-02
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
Sprecher Automations SPRECON-E-C,  SPRECON-E-P, SPRECON-E-T3 is vulnerable to attack by an unauthorized remote attacker via default cryptographic keys. The use of these keys allows the attacker to read, modify, and write projects and data, or to access any device via remote maintenance.

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 confidence

The SPRECON-E series devices use hardcoded default cryptographic keys that are identical across all units. An unauthenticated remote attacker who knows these default keys can authenticate to the device, allowing complete compromise of project data and remote maintenance access.

MitigationImmediately change all default cryptographic keys to unique, strong keys per device. If keys cannot be changed, isolate devices on a dedicated network segment with strict firewall rules and implement monitoring for unauthorized access attempts.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Sprecon E C FirmwareOperating system
Affected:all versions
Sprecon E P FirmwareOperating system
Affected:all versions
Sprecon E T3 FirmwareOperating system
Affected:all versions

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the device model and firmware version
    Access the device management interface or check the firmware version via system information pages, CLI, or device documentation. Confirm the model is SPRECON-E-C, SPRECON-E-P, or SPRECON-E-T3.
    Affected if The device is any SPRECON-E-C, SPRECON-E-P, or SPRECON-E-T3 device running any firmware version.
  2. Verify if default cryptographic keys have been replaced
    Access the device security or cryptography configuration settings. Look for key management sections where encryption keys, authentication keys, or certificates are configured. Check if the current keys differ from factory default values documented in the device manual.
    Affected if The device is still using factory default cryptographic keys rather than unique keys generated or configured after installation.
  3. Review remote maintenance access logs
    Examine device audit logs, access logs, or connection history for remote maintenance sessions. Look for connections from unexpected IP addresses or at unusual times.
    Affected if Unauthorized or unexplained remote maintenance connections are present in the logs.
  4. Check network exposure of management interfaces
    Scan the network to determine if the device management interface (web UI, remote access ports, or engineering protocol ports) is accessible from untrusted networks or the internet.
    Affected if Management interfaces are exposed to untrusted networks without firewall protection.
  5. Inspect project files for unauthorized modifications
    If possible, review project configurations, data files, or backup files on the device for unexpected changes or unauthorized access indicators.
    Affected if Project files or configurations show signs of unauthorized modification or unexpected changes.

A user is affected if they have any SPRECON-E-C, SPRECON-E-P, or SPRECON-E-T3 device that still uses the factory default cryptographic keys rather than unique keys rotated after deployment.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Immediately change all default cryptographic keys to unique, strong keys per device. If keys cannot be changed, isolate devices on a dedicated network segment with strict firewall rules and implement monitoring for unauthorized access attempts.

Fix this in Sprecon E C Firmware Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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Scan for this in your stack

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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 sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-41742 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data