CVE-2019-13926
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 · uneditedA vulnerability has been identified in SCALANCE S602 (All versions >= V3.0 and < V4.1), SCALANCE S612 (All versions >= V3.0 and < V4.1), SCALANCE S623 (All versions >= V3.0 and < V4.1), SCALANCE S627-2M (All versions >= V3.0 and < V4.1). Specially crafted packets sent to port 443/tcp of affected devices could cause a Denial-of-Service condition of the web server. A cold reboot is required to restore the functionality of the device.
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 confidenceDenial-of-service vulnerability in SCALANCE S602, S612, S623, and S627-2M web servers. Specially crafted packets sent to port 443/tcp crash the web server, requiring a cold reboot to restore functionality. Affects versions V3.0 through V4.0.x.
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>= 3.0, < 4.1>= 3.0, < 4.1>= 3.0, < 4.1>= 3.0, < 4.1CVSS 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 SCALANCE modelLocate the device model label on the physical unit or check the device inventory/network management system for the model designation (S602, S612, S623, or S627-2M)Affected if Model is not one of the four listed (S602, S612, S623, S627-2M)
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Check installed firmware versionAccess the device web interface or CLI and navigate to System Information or Firmware section to retrieve the current firmware version, or query the device via SNMP or management interfaceAffected if Firmware version is >= 3.0 and < 4.1 (including any V3.x or V4.0.x release)
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Verify port 443/tcp exposurePerform a network port scan from an external host or review firewall rules to determine if TCP port 443 is accessible from untrusted networksAffected if Port 443/tcp is reachable from networks outside the trusted management segment
The device is affected if it is a Scalance S602, S612, S623, or S627-2M with firmware version 3.0 through 4.0.x and port 443/tcp is externally accessible.
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 data4.1
Upgrade firmware to V4.1 or later. If immediate upgrade is not feasible, restrict network access to port 443/tcp via firewall or network segmentation to prevent external exploitation.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-13926 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
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-2019-13926 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
- No weaponised exploit code, or anything meant to cause harm
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