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PatchSiren cyber security CVE debrief

CVE-2016-8364 Ibhsoftec CVE debrief

CVE-2016-8364 describes a critical heap-based buffer overflow in IBHsoftec S7-SoftPLC. According to the CVE record, object memory can process a network packet that is larger than the space available, which can lead to memory corruption in versions prior to 4.12b. NVD rates the issue CVSS 3.0 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating a remotely reachable issue with potentially severe impact.

Vendor
Ibhsoftec
Product
S7-Softplc
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2016-08-05
Original CVE updated
2025-06-26
Advisory published
2016-08-05
Advisory updated
2025-06-26

Who should care

Administrators, integrators, and defenders responsible for IBHsoftec S7-SoftPLC deployments, especially systems that are network-reachable or exposed beyond tightly controlled segments.

Technical summary

The official record maps this issue to CWE-119 and a vulnerable CPE range for ibhsoftec:s7-softplc ending at version 4.12 inclusive, while the narrative description says the problem affects versions prior to 4.12b. The vulnerability is described as a heap-based buffer overflow triggered when object memory reads a network packet larger than the available space. The supplied record does not include a CISA KEV date or ransomware association.

Defensive priority

Critical

Recommended defensive actions

  • Upgrade IBHsoftec S7-SoftPLC to 4.12b or later, following vendor and advisory guidance.
  • Inventory all S7-SoftPLC instances and confirm the exact installed version against the vulnerable range.
  • Restrict network exposure to trusted management paths only; do not leave affected systems broadly reachable.
  • Segment affected systems from untrusted networks and apply strict allowlisting where feasible.
  • Monitor for service crashes, abnormal memory faults, and unexpected packet handling on affected hosts.
  • Review the ICS-CERT advisory referenced in the record for any vendor-specific mitigation or update instructions.

Evidence notes

This debrief is based on the supplied CVE description, NVD record metadata, and referenced advisories. The record states publication on 2017-02-13 and a later NVD modification on 2026-05-13, which are used only as record-timing context. The supplied enrichment does not indicate a CISA KEV listing or ransomware campaign use. Version boundary wording differs slightly between sources: the narrative says 'prior to 4.12b' while the CPE range ends at 4.12 inclusive.

Sources and references

Verified primary and authoritative sources

  • CVE-2016-8364 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2016-8364

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2016-8364 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2016-8364

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.