Security readout for executives and security teams
Plain-English summary
A flaw in Phoenix Contact CHARX SEC systems may let an unauthenticated remote attacker send malicious data through MQTT to the ModbusServer application. Successful abuse could alter operations or disrupt availability. The supplied version data is ambiguous, so organizations should verify affected status directly with Phoenix Contact guidance.
Executive priority
Treat as an urgent verification and containment issue because compromise could alter or interrupt operational services without authentication. Prioritize internet-exposed, remotely managed, or weakly segmented deployments. Do not assume version 1.0.0 is vulnerable until the vendor resolves the supplied status ambiguity.
Technical view
SystemConfigManager reportedly fails to validate or strip CRLF characters from MQTT-sourced input before ModbusServer processes it. This CWE-93 injection issue has CVSS 3.1 score 9.1, reflecting network access, low complexity, no authentication, and high integrity and availability impact. Confidentiality impact is not indicated.
Likely exposure
Potential exposure exists where listed CHARX SEC-3000, SEC-3050, SEC-3100, or SEC-3150 systems process attacker-reachable MQTT input. However, the bundle lists version 1.0.0 while also marking default status as unaffected. Exact affected versions and required network conditions therefore remain unclear.
Exploitation context
No active exploitation is established by the supplied sources, and the CVE is not identified as CISA KEV. The reported attack is remote and unauthenticated, but successful access appears dependent on reaching or influencing the MQTT data path used by ModbusServer.
Researcher notes
The source bundle attributes the weakness to missing CRLF validation in SystemConfigManager and classifies it as CWE-93. Impact is integrity and availability loss, with no stated confidentiality effect. No public exploit, exploitation evidence, patch version, or specific mitigation is provided. Avoid vulnerability testing on operational devices without vendor-approved procedures.
Mitigation direction
- Check Phoenix Contact and CERT@VDE guidance for confirmed affected versions and vendor-approved remediation.
- Restrict MQTT access to explicitly authorized systems and trusted network segments.
- Prevent untrusted networks from reaching device management, MQTT, and Modbus interfaces.
- Monitor MQTT messages and device behavior for unexpected configuration changes or service disruption.
Validation and detection
- Inventory the listed CHARX SEC models, firmware versions, and deployed network locations.
- Confirm affected status with Phoenix Contact because the supplied version metadata is ambiguous.
- Review MQTT authentication, authorization, broker exposure, and publisher trust boundaries.
- Inspect logs for anomalous MQTT input, configuration changes, ModbusServer errors, or restarts.
- Verify segmentation prevents unauthorized sources from publishing into the relevant MQTT data path.
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-93: 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-2026-44092 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
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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
2 official scoresWe 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:H/A:H3.95.2CERTVDECVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N——CERTVDEVulnerability scoring details
Base CVSS 4.0 score
8.8HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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://www.certvde.com/en/advisories/VDE-2026-008/CVE reference, CERTVDE
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 Neutralization of CRLF Sequences ('CRLF Injection')
Improper Neutralization of CRLF Sequences ('CRLF Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.