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CVE-2026-21404 NAVTOR CVE debrief

CVE-2026-21404 is a medium-severity vulnerability in NAVTOR NavBox versions up to 4.16.1.20. The issue arises from hard-coded credentials within its Windows Communication Foundation (SOAP) implementation. If SOAP functionality is enabled, a local attacker can extract these credentials to bypass the intended transfer workflow. Successful authentication against the SOAP interface grants access to privileged WCF methods, allowing an attacker to write or overwrite files within application-defined paths.

Vendor
NAVTOR
Product
NavBox
CVSS
MEDIUM 6.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-06-04
Advisory published
2026-06-04
Advisory updated
2026-06-04

Who should care

Administrators and users of NAVTOR NavBox versions up to 4.16.1.20 should be aware of this vulnerability, especially if SOAP functionality is enabled.

Technical summary

The vulnerability has a CVSS score of 5.8 and is classified as CWE-798. It requires local access and high attack complexity.

Defensive priority

MEDIUM

Recommended defensive actions

  • Disable SOAP functionality if not required.
  • Update NAVTOR NavBox to a version beyond 4.16.1.20.
  • Restrict access to the SOAP interface.
  • Monitor for suspicious activity related to file modifications within application-defined paths.

Evidence notes

Evidence from official sources, including CVE.org and NVD, confirms the existence and details of this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21404 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21404

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-21404 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21404

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.