Security readout for executives and security teams
This flaw can let a network attacker knock affected Siemens SIMATIC S7-300 and S7-400 CPUs into defect mode by sending crafted traffic to TCP port 80. Recovery requires a cold restart, so the main business risk is operational downtime in industrial environments. Exposure is most likely where affected Siemens CPUs are deployed and TCP port 80 is reachable from plant, engineering, vendor-access, or other routable network paths. The bundle lists all versions of several S7-300 and S7-400 CPU families as affected. Treat this as a high-priority availability risk for facilities using affected Siemens PLCs. It does not indicate data theft, but it can interrupt industrial operations and may require hands-on recovery planning. Mitigation focus: Review Siemens SSA-731239 and CISA ICSA-16-348-05 for official guidance.; Inventory affected S7-300 and S7-400 CPUs and SIPLUS variants.; Restrict TCP port 80 access to trusted management and engineering hosts..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2016-9158 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://ics-cert.us-cert.gov/advisories/ICSA-16-348-05CVE reference, siemens · x_refsource_MISC
- https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-731239.pdfCVE reference, siemens · x_refsource_CONFIRM
- https://cert-portal.siemens.com/productcert/pdf/ssa-731239.pdfCVE reference, siemens · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.