Security readout for executives and security teams
Plain-English summary
CVE-2019-6575 is a Siemens industrial systems vulnerability affecting many SIMATIC, WinCC, SINEC, SINEMA, SINUMERIK, and TeleControl products using OPC UA. An attacker with network access to TCP port 4840 could crash OPC communications or the device, causing operational disruption. No active exploitation is stated in the provided sources.
Executive priority
Treat as a high-priority availability risk for industrial operations. Prioritize sites where affected Siemens devices support production, safety-adjacent monitoring, or remote OPC UA connectivity. The main business concern is disruption, not data theft.
Technical view
The issue is CWE-248 in affected Siemens OPC UA implementations. Crafted network packets to 4840/tcp can trigger denial of service. CVSS is 7.5 high: network exploitable, low complexity, no privileges, no user interaction, availability impact only. Affected versions and fixed-version thresholds vary by product.
Likely exposure
Exposure is most relevant in OT networks where affected Siemens products expose OPC UA on TCP port 4840. Internet exposure would materially increase risk, but the sources only require network access to affected systems.
Exploitation context
The provided sources describe unauthenticated remote denial of service against OPC communication or device availability. CISA KEV is false in the bundle, and no cited source states active exploitation.
Researcher notes
The CVE scope is broad and product-specific. Validate exposure by product, version, and OPC UA network reachability. Avoid assuming remediation for entries marked all versions affected; use Siemens advisory guidance. No evidence provided for public exploitation or KEV listing.
Mitigation direction
- Identify affected Siemens products and versions listed for CVE-2019-6575.
- Update products to the fixed versions named in the CVE where available.
- For products listed as all versions affected, check Siemens SSA-307392 for current guidance.
- Restrict network access to OPC UA port 4840 to trusted systems only.
- Prioritize segmentation and monitoring for OT networks containing affected Siemens assets.
Validation and detection
- Inventory Siemens SIMATIC, WinCC, SINEC, SINEMA, SINUMERIK, and TeleControl assets.
- Compare installed versions against the affected version ranges in the CVE record.
- Confirm whether TCP port 4840 is reachable from untrusted or broad network zones.
- Review change records to verify applicable updates were installed.
- Check Siemens ProductCERT advisory SSA-307392 for product-specific remediation status.
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.
CWE-248: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-6575 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://cert-portal.siemens.com/productcert/pdf/ssa-307392.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.
Uncaught Exception
Uncaught Exception represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.