Security readout for executives and security teams
CVE-2021-22749 is an information exposure issue in Schneider Electric Modicon X80 BMXNOR0200H RTU firmware SV1.70 IR22 and prior. A crafted HTTP request to the module web server could reveal RTU configuration details, including telemetry communication parameters. This is not described as code execution or direct control, but it may expose sensitive operational data. Exposure is most relevant where affected Modicon X80 BMXNOR0200H RTU web servers are reachable from untrusted, shared, or poorly segmented networks. Internet exposure would increase concern, but the sources do not state typical deployment exposure. Treat this as a targeted ICS information disclosure risk. Prioritize discovery and exposure reduction for affected RTUs, especially in environments with remote access, vendor connectivity, or weak segmentation. Do not assume compromise without supporting evidence. Mitigation focus: Identify BMXNOR0200H RTU modules running SV1.70 IR22 or prior.; Review Schneider advisory SEVD-2021-159-05 for official remediation guidance.; Restrict web server access to trusted management networks..
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
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ATT&CK lookup starting points
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CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2021-22749 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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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
Products and packages named in the record
CWE details
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Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.