Security readout for executives and security teams
Plain-English summary
This is a critical Siemens industrial device flaw affecting SICAM power meters and related devices. An attacker with valid login access to the HTTPS web interface could crash the device or potentially run code on it, risking outages or loss of control in operational environments.
Executive priority
Treat as high-priority remediation for any exposed operational technology environment. The vulnerability requires authentication, but the potential impact includes device reboot and arbitrary code execution on equipment used in power monitoring and control contexts.
Technical view
Affected devices improperly validate the web interface Language parameter on 443/tcp. CVSS 9.9 reflects network access, low complexity, low privileges, no user interaction, changed scope, and high confidentiality, integrity, and availability impact. Affected versions include SICAM Q100 < V2.50, P850/P855 < V3.10, and SICAM T < V3.0.
Likely exposure
Exposure is most likely in industrial, utility, energy, and facility environments using Siemens SICAM devices with HTTPS management enabled. Risk rises sharply if the web interface is reachable beyond tightly controlled management networks or if shared/default credentials remain in use.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Siemens and CVE sources describe authenticated remote crash and arbitrary code execution potential. CVSS marks exploit code maturity as proof-of-concept, but no weaponized public exploit details are provided here.
Researcher notes
The key weakness is CWE-20 improper input validation in a web-interface parameter. Evidence supports authenticated remote attack potential, not unauthenticated compromise. The supplied affected-product list is lengthy; validate exact model/order-number coverage against Siemens advisories before scoping exceptions.
Mitigation direction
- Upgrade SICAM Q100 devices to V2.50 or later where applicable.
- Upgrade SICAM P850 and P855 devices to V3.10 or later.
- Upgrade SICAM T devices to V3.0 or later.
- Restrict HTTPS management access to trusted administrative networks only.
- Review Siemens advisories for model-specific update and operational guidance.
- Remove unnecessary accounts and enforce strong credential controls.
Validation and detection
- Inventory Siemens SICAM Q100, P850, P855, and SICAM T deployments.
- Record exact order numbers and firmware versions for each device.
- Confirm no affected device remains below the fixed version thresholds.
- Verify port 443/tcp is not reachable from untrusted networks.
- Review reboot and availability logs for unexplained device crashes.
- Track remediation evidence against Siemens advisory references.
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-20: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-43439 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
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
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 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:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C3.16Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://cert-portal.siemens.com/productcert/pdf/ssa-572005.pdfCVE reference
- https://cert-portal.siemens.com/productcert/pdf/ssa-570294.pdfCVE reference
- https://cert-portal.siemens.com/productcert/pdf/ssa-887249.pdfCVE reference
- https://cert-portal.siemens.com/productcert/html/ssa-572005.htmlCVE reference
- https://cert-portal.siemens.com/productcert/html/ssa-570294.htmlCVE reference
- https://cert-portal.siemens.com/productcert/html/ssa-887249.htmlCVE reference
- https://cert-portal.siemens.com/productcert/html/ssa-471761.htmlCVE reference
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.