CVE-2017-12740
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 · uneditedSiemens LOGO! Soft Comfort (All versions before V8.2) lacks integrity verification of software packages downloaded via an unprotected communication channel. This could allow a remote attacker to manipulate the software package while performing a Man-in-the-Middle (MitM) attack.
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 confidenceSiemens LOGO! Soft Comfort versions prior to V8.2 lack integrity verification for downloaded software packages. An attacker performing a Man-in-the-Middle attack can intercept and manipulate the software package in transit, potentially delivering tampered code to end users.
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< 8.2CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
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.
-
Locate Siemens LOGO! Soft Comfort installationOpen File Explorer and navigate to C:\Program Files (x86)\Siemens\LOGO! Soft Comfort or C:\Program Files\Siemens\LOGO! Soft Comfort. If the folder exists, the software is installed.Affected if The folder exists and contains the LOGO! Soft Comfort application files.
-
Find the installed version numberWithin the installation folder, right-click on the executable file (typically named LogoSoft Comfort.exe or similar), select Properties, and view the Details tab to see the Product Version.Affected if A version number is displayed in the Product Version field.
-
Compare version to the affected rangeIf a version number is found, compare the first two digits (major.minor) to 8.2. Versions 8.0, 7.x, 6.x, and any version where the major number is less than 8, or the major is 8 but minor is less than 2, are affected.Affected if The installed version is less than 8.2 (for example, 8.1, 8.0, 7.x, 6.x).
-
Verify download functionality usageDetermine if the software is used to download software packages, programs, or firmware to LOGO! devices. Check recent projects or download history within the application if accessible.Affected if The software is used to download packages to devices and the version is below 8.2.
If Siemens LOGO! Soft Comfort is installed with a version lower than V8.2 and is used to download software packages, the environment is affected by this vulnerability.
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 data8.2
Upgrade to Siemens LOGO! Soft Comfort V8.2 or later which includes integrity verification. Ensure all software downloads occur over authenticated, encrypted channels (TLS/HTTPS).
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 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 $1,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-12740 — 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-2017-12740 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