Security readout for executives and security teams
Plain-English summary
This flaw affects Siemens SIMATIC S7-1200 CPU devices running firmware before version 4.0. A remote attacker could bypass a protection mechanism for user program blocks, potentially weakening controls meant to protect PLC logic. The source bundle does not provide CVSS, CWE, or detailed attack conditions.
Executive priority
Treat this as an OT risk review item, not a confirmed emergency. Prioritize sites with older S7-1200 controllers exposed beyond tightly controlled engineering networks.
Technical view
CVE-2016-2846 describes an unspecified remote bypass of the user program block protection mechanism in Siemens SIMATIC S7-1200 CPUs before 4.0. The public bundle does not include protocol details, prerequisites, proof-of-concept status, or exploit indicators.
Likely exposure
Exposure is most likely where SIMATIC S7-1200 CPUs below firmware 4.0 are deployed and reachable from engineering, plant, vendor, or remote access networks. The bundle does not identify specific models beyond S7-1200 CPU devices.
Exploitation context
The CVE record states remote attackers may bypass protection, but the vector is unspecified. CISA KEV status is false in the provided bundle, and no cited source in the bundle states active exploitation.
Researcher notes
The source bundle lacks CVSS, CWE, protocol, prerequisite, and exploit detail. Analysis should avoid assuming exploitability beyond the stated remote protection bypass and should rely on Siemens SSA-833048 for authoritative remediation.
Mitigation direction
- Inventory Siemens SIMATIC S7-1200 CPU assets and firmware versions.
- Prioritize review of any S7-1200 CPU running firmware before 4.0.
- Consult Siemens SSA-833048 for supported remediation guidance.
- Limit remote access to PLC programming interfaces to trusted engineering paths.
Validation and detection
- Confirm whether any SIMATIC S7-1200 CPU firmware is below version 4.0.
- Check asset exposure from engineering, remote access, and vendor support networks.
- Review Siemens and ICS-CERT advisory records for environment-specific guidance.
- Document compensating controls where immediate firmware remediation is unavailable.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2016-2846 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://ics-cert.us-cert.gov/advisories/ICSA-16-075-01CVE reference · x_refsource_MISC
- https://cert-portal.siemens.com/productcert/pdf/ssa-833048.pdfCVE reference · x_refsource_CONFIRM
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.