Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network attacker crash the webserver component on specific Schneider Electric communication modules. The known impact is denial of service, not data theft or device takeover, but outages in industrial communications equipment can still affect operations.
Executive priority
Treat as high priority for OT environments where affected modules support critical processes or exposed management networks. The business risk is service disruption, so remediation should align with maintenance windows and operational continuity planning.
Technical view
CVE-2022-34759 is a CWE-787 out-of-bounds write caused by improper HTTP header parsing. CVSS 3.1 is 7.5, with network access, low complexity, no privileges, no user interaction, and high availability impact only.
Likely exposure
Exposure is limited to Schneider Electric BMENUA0100 OPC UA Modicon Communication Module V1.10 and prior, and BMENOR2200H X80 advanced RTU Communication Module V1.0, especially where the module webserver is reachable over a network.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The CVSS vector indicates remote, unauthenticated denial-of-service potential against reachable webserver functionality, but no exploit maturity or public exploitation evidence is included.
Researcher notes
The source bundle supports availability-only impact from HTTP header parsing. It does not provide patch version details, proof-of-concept status, or exploit observations. Avoid assuming code execution or broader control impact without Schneider Electric advisory details.
Mitigation direction
- Review Schneider Electric security notification SEVD-2022-193-01 for official remediation guidance.
- Inventory affected BMENUA0100 and BMENOR2200H modules and record firmware versions.
- Apply vendor-provided firmware updates or mitigations if specified by Schneider Electric.
- Reduce network reachability to module webserver interfaces where operationally feasible.
- Prioritize monitoring and recovery plans for affected operational environments.
Validation and detection
- Confirm whether BMENUA0100 firmware is V1.10 or earlier.
- Confirm whether any BMENOR2200H module is running V1.0.
- Verify affected webserver interfaces are not broadly reachable from untrusted networks.
- Check maintenance records for Schneider Electric advisory SEVD-2022-193-01 actions.
- Use non-destructive validation; do not crash-test production OT equipment.
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-787: 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-2022-34759 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.
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:H3.93.6Primary CVE scoreVulnerability 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
Source materials
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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.