CVE-2025-13406
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 · uneditedNULL Pointer Dereference vulnerability in Softing Industrial Automation GmbH smartLink SW-HT (Webserver modules) allows HTTP DoS.This issue affects smartLink SW-HT: 1.43.
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 · moderate confidenceA NULL pointer dereference vulnerability in the webserver modules of Softing Industrial Automation GmbH smartLink SW-HT version 1.43 allows remote attackers to cause a denial of service via crafted HTTP requests. The vulnerability stems from improper memory handling when processing certain HTTP requests, leading to a crash when the application attempts to access a NULL pointer.
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
- High
- Authentication
- Y
- User interaction
- A
- Scope
- X
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:L/U:Red
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.
-
Identify if smartLink SW-HT is installedLocate the smartLink SW-HT software on the system. This is typically found in the installation directory of Softing Industrial products or can be identified via system inventory tools. Check for directories named 'smartLink' or 'SW-HT' in program files.Affected if The software is present on the system
-
Check the installed version numberAccess the smartLink SW-HT interface or check the software properties/installation details to determine the exact version. Typically found in the web UI footer, 'About' section, or Windows program properties. Compare against version 1.43.Affected if The installed version is exactly 1.43
-
Verify the webserver module is enabledAccess the smartLink SW-HT web interface via browser on the default HTTP port (typically port 80 or 443). If a web login page or status page loads, the webserver module is active.Affected if The webserver module is accessible and responding to HTTP requests
-
Confirm network exposure of the web interfaceCheck network configuration to determine if the smartLink SW-HT webserver is exposed to untrusted networks. Use 'netstat' or similar tools to identify listening ports and verify firewall rules allowing HTTP access.Affected if The webserver is reachable from network segments that contain untrusted or external hosts
A system is affected if smartLink SW-HT version 1.43 is installed with its webserver module enabled and accessible, as the NULL pointer dereference occurs when processing certain crafted HTTP requests.
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 dataApply the vendor-provided security patch or firmware update for smartLink SW-HT version 1.43. If no patch is available, implement network segmentation and HTTP request rate limiting at the perimeter to reduce exploitability while awaiting an official fix.
- Consultation4.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,968.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-13406 — 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-2025-13406 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
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.
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.
- 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