Security readout for executives and security teams
Plain-English summary
Certain ELECOM wireless LAN routers let an authenticated administrator upload a dangerous file that can lead to operating system command execution. This is not a drive-by internet bug in the supplied data, but it is serious where router admin access is exposed or compromised.
Executive priority
Treat this as a targeted infrastructure risk. It needs timely inventory and remediation for affected ELECOM routers, especially in offices, branches, or managed networks where router admin access may be reachable by many users.
Technical view
CVE-2024-34021 is CWE-434 unrestricted upload of a dangerous file type in listed ELECOM router firmware. A logged-in administrative user can upload a crafted file, resulting in arbitrary OS command execution. CVSS 3.0 is 6.8 with adjacent attack vector, low complexity, high privileges, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to the ELECOM models and firmware versions listed in the advisory bundle, including WRC, WMC, and related variants at or below the specified versions. Risk is highest where router administration is reachable from untrusted local networks or shared environments.
Exploitation context
The bundle does not show CISA KEV listing or cite active exploitation. Exploitation requires administrative privilege and adjacent network access per the CVSS vector, but successful abuse can execute OS commands on the router.
Researcher notes
The source data supports command execution through dangerous file upload by an authenticated administrator. It does not provide exploit details, patch specifics, or evidence of exploitation. Validation should focus on product/version matching and management-plane exposure, not exploit reproduction.
Mitigation direction
- Inventory ELECOM router models and firmware versions against the affected list.
- Check ELECOM and JVN guidance for fixed firmware or supported remediation.
- Restrict router administration to trusted management networks only.
- Remove unnecessary remote or shared administrative access paths.
- Replace or isolate affected devices if no vendor-supported fix is available.
Validation and detection
- Confirm exact model and firmware version from the router management interface.
- Compare firmware against each affected version threshold in the bundle.
- Review administrative access exposure from wireless and local network segments.
- Check logs or configuration history for unexpected administrative uploads or changes.
- Document remediation status and remaining unsupported devices.
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-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection 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 lookupCVE-2024-34021 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
- Medium
- CVSS
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/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:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H0.95.9jpcertCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H0.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AV:A/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/20240730-01/CVE reference, jpcert
- https://jvn.jp/en/jp/JVN06672778/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.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.