CVE-2014-2258
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 SIMATIC S7-1200 CPU PLC devices with firmware before 4.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted HTTPS packets, a different vulnerability than CVE-2014-2259.
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 SIMATIC S7-1200 CPU PLC devices with firmware versions prior to 4.0 contain a vulnerability where remote attackers can send specially crafted HTTPS packets to trigger a denial of service condition, forcing the device into defect-mode (a safe/failsafe state). This network-based attack requires no authentication.
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<= 3.0.2= 3.0all versionsall versionsall versionsall versionsall versionsCVSS 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
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Complete
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 the SIMATIC S7-1200 model numberLocate the device nameplate or check device documentation - look for model numbers: CPU 1211c, 1212c, 1214c, 1215c, 1217c, or S7-1200Affected if Model is any of 1211c, 1212c, 1214c, 1215c, 1217c (all versions affected) or S7-1200 with certain firmware
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Determine the firmware versionAccess the PLC's built-in web server via HTTPS (e.g., https://<device_ip>) and navigate to the version info page, or use SIMATIC Manager / TIA Portal to go online and read the CPU firmware version from the deviceAffected if Firmware version is 3.0, 3.0.1, 3.0.2, or any version < 4.0 for the base S7-1200 CPU; models 1211c/1212c/1214c/1215c/1217c are affected regardless of version
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Verify HTTPS service is accessibleAttempt an HTTPS connection to the PLC's IP address on port 443 (or configured HTTPS port) using a browser or OpenSSL s_client: openssl s_client -connect <device_ip>:443Affected if HTTPS connection succeeds and the device responds - this confirms the attack surface is exposed
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Check network exposure of the HTTPS interfaceReview firewall rules, VLAN configuration, or network segmentation to determine if the PLC's HTTPS port is reachable from untrusted networksAffected if The HTTPS interface is reachable from networks other than a trusted engineering/operations network
You are affected if you have a CPU 1211c/1212c/1214c/1215c/1217c (any firmware version) or an S7-1200 CPU with firmware <= 3.0.2, and your device's HTTPS interface is network-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 dataUpgrade SIMATIC S7-1200 CPU firmware to version 4.0 or later to remediate. If immediate patching is not feasible, restrict network access to the PLC's HTTPS interface via firewalls or network segmentation to limit exposure to untrusted networks.
- Consultation4.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2014-2258 — 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-2014-2258 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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