Security readout for executives and security teams
Plain-English summary
Schneider Electric communication modules can be forced into a webserver denial of service through malformed cookie handling. This affects specific Modicon OPC UA and X80 RTU modules used in industrial environments. The business impact is availability loss, not disclosed data theft or system takeover.
Executive priority
Prioritize as high where affected modules support operational processes or are reachable beyond tightly controlled OT segments. The main risk is service disruption to industrial communication infrastructure, not data compromise based on the provided sources.
Technical view
CVE-2022-34760 is a CWE-835 infinite-loop flaw in webserver cookie handling. It is network reachable, low complexity, requires no authentication or user interaction, and impacts availability only. Affected products are BMENOR2200H V1.0 and BMENUA0100 V1.10 and prior.
Likely exposure
Exposure is likely where affected Schneider Electric modules are deployed and their webserver interfaces are reachable from operational, corporate, or internet-facing networks. Isolated OT networks reduce likelihood, but unauthenticated network reachability keeps urgency high.
Exploitation context
The provided sources do not state active exploitation, and this CVE is not marked KEV. Treat exploitation as plausible because the CVSS vector is network-based, unauthenticated, and low complexity, but do not assume observed attacks without additional evidence.
Researcher notes
Evidence identifies product versions, weakness class, and CVSS impact, but the bundle does not name fixed firmware or detailed mitigations. Avoid claiming exploitation or a specific patch level unless confirmed in Schneider Electric's advisory.
Mitigation direction
- Inventory BMENOR2200H and BMENUA0100 modules and record firmware versions.
- Review Schneider Electric advisory SEVD-2022-193-01 for official updates or mitigations.
- Restrict access to affected webserver interfaces to trusted management networks only.
- Monitor affected devices for webserver hangs, restarts, or unexplained availability loss.
- Prioritize remediation for modules reachable across network boundaries.
Validation and detection
- Confirm whether BMENOR2200H V1.0 is present in the environment.
- Confirm whether BMENUA0100 V1.10 or earlier is present.
- Map which networks can reach each module webserver interface.
- Check monitoring data for recurring webserver denial-of-service symptoms.
- Verify remediation status against Schneider Electric's official notification.
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-835: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-34760 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.
Loop with Unreachable Exit Condition ('Infinite Loop')
Loop with Unreachable Exit Condition ('Infinite Loop') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.