Security readout for executives and security teams
Plain-English summary
This issue lets a malicious web page trick a logged-in router administrator into making unwanted changes on affected ELECOM routers, such as changing the login ID or password. It is not described as remote takeover by itself; it depends on administrator browser interaction during an active admin session.
Executive priority
Treat this as a medium-priority integrity risk for networks using affected ELECOM routers. Prioritize inventory and vendor guidance review, especially for small offices, remote sites, and environments where router credentials protect business connectivity.
Technical view
CVE-2024-40883 is a CWE-352 cross-site request forgery flaw in multiple ELECOM wireless LAN routers. The CVSS 3.0 score is 6.5, with network attack vector, low complexity, no attacker privileges, required user interaction, and high integrity impact.
Likely exposure
Exposure is limited to listed ELECOM router models and firmware versions at or below the affected releases. Risk is highest where administrators manage routers through a browser and may browse other sites while still authenticated.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires a logged-in administrator to view a malicious page, which may trigger unintended router management operations.
Researcher notes
Evidence supports CSRF affecting administrative actions, with examples including login ID and password changes. The source bundle does not provide exploit details, public exploitation evidence, or specific patched version numbers, so validation should focus on affected model/version matching and vendor advisory review.
Mitigation direction
- Identify affected ELECOM router models and firmware versions in use.
- Check ELECOM guidance for updates or vendor-approved remediation.
- Avoid general web browsing from active router admin sessions.
- Log out of the router management interface after changes.
- Restrict router administration to trusted users and management networks where possible.
Validation and detection
- Inventory ELECOM routers against the affected model and version list.
- Confirm firmware versions are above the affected thresholds or covered by vendor guidance.
- Review router configuration for unexpected administrator credential or login ID changes.
- Verify administrators understand not to browse untrusted sites while logged in.
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-352: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2024-40883 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
- 6.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A: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:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N2.83.6jpcertCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N2.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Base CVSS 3.0 score
6.5MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.