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Findings

Vulnerability · CVE-2025-53558

Use of Weak Credentials

Published Apr 30, 2026 · corrected/updated Apr 30, 2026 · ZTE Japan. K.K. ZXHN-F660T · evidence confidence very high

ZXHN-F660T and ZXHN-F660A provided by ZTE Japan K.K. use a common credential for all installations. With the knowledge of the credential, an attacker may log in to the affected devices. VulnCheck canary evidence. Initial-access exploit intelligence.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2025-53558 is a unknown public vulnerability record for ZTE Japan. K.K. ZXHN-F660T. CISA lists it as known exploited. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether ZTE Japan. K.K. ZXHN-F660T is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: ZTE Japan. K.K. ZXHN-F660T. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: EPSS 1.4%. CISA lists it as known exploited. Sources contributing to this record: cve_org, epss, vulncheck_kev. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Confirmed in CISA KEV since Apr 30, 2026. Listed in CISA KEV and VulnCheck KEV.

  • Patch and remediation

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 30, 2026 · VulnCheck KEV

    Detected

    ZXHN-F660T and ZXHN-F660A provided by ZTE Japan K.K. use a common credential for all installations. With the knowledge of the credential, an attacker may log in to the affected devices. VulnCheck canary evidence. Initial-access exploit intelligence.

  2. Apr 30, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected

  • vendor ZTE Japan. K.K. ZXHN-F660Tversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2025-53558

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-53558

    30-day exploitation probability 1.4%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2025-53558

    ZXHN-F660T and ZXHN-F660A provided by ZTE Japan K.K. use a common credential for all installations. With the knowledge of the credential, an attacker may log in to the affected devices.

    vulncheck.com

References