Security readout for executives and security teams
Plain-English summary
CVE-2024-40086 is a critical flaw in Vilo 5 Mesh WiFi System firmware. An unauthenticated attacker on an adjacent network could abuse WiFi password handling to run code on the device. Compromised mesh routers can threaten network confidentiality, integrity, and availability.
Executive priority
Treat as urgent for environments using Vilo 5 mesh devices, especially in offices, remote sites, or sensitive networks. Prioritize inventory, segmentation, and vendor remediation tracking because router compromise can undermine broader network trust.
Technical view
The issue is a CWE-120 buffer overflow in local_app_set_router_wifi_SSID_PWD affecting Vilo 5 Mesh WiFi System versions up to 5.16.1.33. The CVSS 3.1 score is 9.6 with adjacent-network attack vector, low complexity, no privileges, no user interaction, scope change, and high impact.
Likely exposure
Exposure is most likely where Vilo 5 mesh devices run firmware 5.16.1.33 or earlier and attacker adjacency to the device network is possible. The CVE source does not provide CPEs, deployment counts, or a vendor patch statement.
Exploitation context
The provided data does not show CISA KEV listing or cited in-the-wild exploitation. Public research describes the vulnerability, but this assessment does not infer active exploitation beyond the supplied evidence.
Researcher notes
Evidence identifies a password-field-triggered buffer overflow in local_app_set_router_wifi_SSID_PWD. Avoid assuming internet reachability because the CVSS vector is adjacent network. The public record lacks CPEs, patch status, and KEV evidence, so validation should focus on confirmed firmware and topology.
Mitigation direction
- Inventory Vilo 5 mesh devices and record firmware versions.
- Check Vilo or vendor guidance for fixed firmware before upgrading.
- Restrict local app or router management access to trusted networks.
- Segment affected mesh networks from sensitive business systems.
- Replace or isolate devices if no supported fix is available.
Validation and detection
- Confirm whether any Vilo 5 device runs firmware 5.16.1.33 or earlier.
- Review network paths that allow adjacent access to router services.
- Check CVE and vendor sources for updated remediation guidance.
- Monitor logs for unexpected router configuration changes or instability.
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-120: 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 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 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-2024-40086 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
- Critical
- CVSS
- 9.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/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
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:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H2.86CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.6CriticalVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/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://github.com/byu-cybersecurity-research/vilo/blob/main/vulns/CVE-2024-40086.mdCVE reference, mitre
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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.