Security readout for executives and security teams
Plain-English summary
CVE-2019-10931 affects Siemens SIPROTEC 5 protection devices and DIGSI 5 engineering software. Specially crafted network traffic to HTTPS port 443 can trigger a denial-of-service condition. For power or industrial environments, the concern is loss of availability in protection or engineering systems, not data theft.
Executive priority
Treat this as a high-priority OT availability issue if affected SIPROTEC 5 assets support critical protection functions or are reachable beyond a tightly controlled engineering network. Prioritize inventory, segmentation review, and vendor-guided upgrades or controls.
Technical view
The CVE describes improper handling of exceptional conditions, CWE-248, in listed SIPROTEC 5 CPU variants and Ethernet communication modules, plus DIGSI 5 before V7.90. Crafted packets to 443/TCP may cause DoS. The bundle does not provide CVSS, exploit prerequisites beyond network reachability, or recovery details.
Likely exposure
Exposure is most likely where SIPROTEC 5 management interfaces or DIGSI-related systems are reachable on TCP 443 from engineering, operations, vendor, or broader corporate networks. Internet exposure would materially increase risk, but the supplied sources do not state that affected devices are commonly internet-facing.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked KEV. The described attack path is network-based traffic to 443/TCP, so practical risk depends on segmentation, access controls, device versions, and whether affected services are reachable.
Researcher notes
The bundle supports affected product/version ranges and the TCP 443 DoS condition, but lacks CVSS, detailed exploit prerequisites, recovery behavior, and confirmed fixes for every listed all-version category. Avoid assuming exploitation or a universal patch without the Siemens advisory.
Mitigation direction
- Identify affected SIPROTEC 5 models, CPU variants, Ethernet modules, and DIGSI 5 installations.
- Upgrade DIGSI 5 to V7.90 or later where applicable.
- Upgrade listed SIPROTEC 5 devices to the non-affected version thresholds where available.
- Restrict TCP 443 management access to trusted engineering hosts and networks.
- Review the Siemens advisory for product-specific compensating controls and unsupported all-version cases.
Validation and detection
- Inventory SIPROTEC 5 device type, CPU variant, module, and firmware version.
- Confirm DIGSI 5 versions and compare against the V7.90 threshold.
- Map which networks can reach affected assets on TCP 443.
- Check monitoring for unexplained device resets, service loss, or management interface outages.
- Confirm any compensating controls match Siemens advisory guidance.
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-2019-10931 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://cert-portal.siemens.com/productcert/pdf/ssa-899560.pdfCVE reference · 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.