CVE-2025-14672
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 flaw has been found in gmg137 snap7-rs up to 1.142.1. This impacts the function TSnap7MicroClient::opWriteArea of the file s7_micro_client.cpp. Executing a manipulation can lead to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.
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 confidenceA heap-based buffer overflow vulnerability exists in the snap7-rs library's TSnap7MicroClient::opWriteArea function in s7_micro_client.cpp up to version 1.142.1. An attacker can manipulate the write parameters to overflow the heap-allocated buffer, potentially achieving remote code execution with the published exploit.
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<= 1.142.1CVSS 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
- 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 checksWork through these to decide whether this CVE applies to you.
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Identify snap7-rs dependencySearch your project dependencies (Cargo.toml, lock files, package managers) for the snap7-rs crate/libraryAffected if snap7-rs is listed as a direct or transitive dependency
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Check installed snap7-rs versionRun cargo tree -p snap7-rs or check Cargo.lock for the snap7-rs version numberAffected if The version is 1.142.1 or lower
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Verify usage of opWriteArea functionSearch your codebase for calls to opWriteArea method on TSnap7MicroClient structAffected if The vulnerable opWriteArea function is being called in your application
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Check if write parameters come from untrusted sourcesInspect the code paths that provide parameters (offset, start, amount, data) to opWriteArea; determine if these values originate from network input, user input, or external sourcesAffected if Write area parameters (offset, size, amount) are derived from network packets or untrusted input without validation
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Assess network exposureDetermine if the TSnap7MicroClient is exposed to network connections or accepts PLC communication from remote sourcesAffected if The snap7-rs client handles communications from untrusted or network-accessible PLC devices
You are affected if snap7-rs version 1.142.1 or lower is in your dependency chain AND your application calls opWriteArea with parameters derived from untrusted or network sources.
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 dataUpgrade snap7-rs to a version beyond 1.142.1 once the vendor releases a patch, and implement proper bounds validation on the opWriteArea function parameters to prevent heap buffer overflows.
- Consultation2.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-14672 — 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-2025-14672 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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- Version or environment caveats, and links to real fixes
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