Security readout for executives and security teams
Plain-English summary
CVE-2026-4619 affects NEC Platforms Aterm WX3600HP routers before Ver. 1.5.3. It is a path traversal flaw that may let a highly privileged network attacker overwrite files. Business urgency is moderate: exploitation requires high privileges and high complexity, but successful misuse could disrupt device operation or alter important files.
Executive priority
Prioritize remediation for internet-exposed or broadly reachable management interfaces. Treat as a moderate operational risk because exploitation needs privileged access, but file overwrite capability can affect device integrity and availability.
Technical view
The issue is CWE-22 path traversal in NEC Platforms Aterm WX3600HP before Ver. 1.5.3. The CVSS 4.0 vector is AV:N/AC:H/PR:H/UI:N, with low confidentiality impact and high integrity and availability impact. The public description states an attacker can write over arbitrary files via network.
Likely exposure
Organizations using NEC Aterm WX3600HP devices running firmware before Ver. 1.5.3 are the known exposed population. The source bundle does not identify other affected Aterm models or configurations.
Exploitation context
No CISA KEV listing is provided, and the supplied sources do not state active exploitation. The CVSS vector indicates exploitation is network-accessible but requires high privileges and high attack complexity, with no user interaction.
Researcher notes
Evidence is limited to the CVE record and NEC advisory reference. The public metadata does not include exploit details, proof of concept, or broader model impact. Avoid assuming compromise without logs or vendor confirmation.
Mitigation direction
- Identify NEC Aterm WX3600HP devices and record firmware versions.
- Update affected devices to Ver. 1.5.3 or later per NEC guidance.
- Restrict administrative network access to trusted management networks.
- Monitor NEC advisories for additional affected models or remediation notes.
Validation and detection
- Confirm each Aterm WX3600HP firmware version is Ver. 1.5.3 or later.
- Review device administration exposure from untrusted networks.
- Check asset inventory for unmanaged or remote NEC Aterm WX3600HP devices.
- Document remediation status and exceptions for vulnerability management tracking.
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-22: 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-4619 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 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/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.
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:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6MediumVector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://jpn.nec.com/security-info/secinfo/nv26-001_en.htmlCVE reference
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.