Security readout for executives and security teams
Plain-English summary
Certain ELECOM wireless LAN routers can let a logged-in user send a crafted request that runs operating-system commands on the device. That can compromise the router’s confidentiality, integrity, and availability. The issue is serious, but the provided sources indicate authentication is required and do not show active exploitation.
Executive priority
Prioritize remediation for business-managed or internet-adjacent ELECOM routers because command execution on network equipment can undermine traffic, availability, and trust. Treat this as high priority, while noting that the provided evidence requires a logged-in user and does not establish active exploitation.
Technical view
CVE-2026-22550 is CWE-78 OS command injection in multiple ELECOM WRC wireless LAN products. CVSS 4.0 score is 8.6 with network attack vector, low complexity, no user interaction, and high privileges required. Successful exploitation may allow arbitrary OS command execution on affected firmware versions.
Likely exposure
Exposure is limited to listed ELECOM WRC models running the affected firmware versions or earlier, especially where router administration is reachable over a network by authenticated users. The bundle provides no CPEs and no deployment prevalence data, so asset discovery must rely on model and firmware inventory.
Exploitation context
The source bundle says exploitation uses a crafted request from a logged-in user. KEV status is false, and no cited source in the bundle reports active exploitation. The practical risk is highest if administrative credentials are shared, weak, reused, or if management access is broadly reachable.
Researcher notes
Focus validation on authenticated management paths for the listed firmware lines. Avoid assuming unauthenticated exploitation. The source bundle lacks endpoint details, proof-of-concept data, fixed-version mapping, and exploitation reports, so conclusions should stay bounded to arbitrary OS command execution via crafted authenticated request.
Mitigation direction
- Identify ELECOM WRC models and firmware versions in your environment.
- Check ELECOM and JVN advisories for fixed firmware or vendor mitigations.
- Restrict router management access to trusted administrative networks only.
- Review and tighten administrator account access on affected devices.
- Monitor affected routers for unexpected configuration or service changes.
Validation and detection
- Compare each router model and firmware against the affected version list.
- Confirm administrative interfaces are not broadly reachable from untrusted networks.
- Review vendor advisories for updated firmware availability and installation requirements.
- Check whether any affected devices use shared or stale administrator credentials.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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-2026-22550 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
- 8.6 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——jpcertCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9jpcertVulnerability scoring details
Base CVSS 4.0 score
8.6HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.0 score
7.2HighVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/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.elecom.co.jp/news/security/20260203-01/CVE reference, jpcert
- https://jvn.jp/en/jp/JVN94012927/CVE reference, jpcert
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 Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.