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TI-2021-14001 Aliases CVE-2021-35035GHSA-778x-386c-73gw

Cleartext storage of sensitive information in Zyxel NBG6604 series firmware

Priority LOW 30CWE-312Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-312.

Summary

A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file.

Why it matters now

EPSS 0.00668 52nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZyxelNBG6604 series firmware1.00(ABIR.8)C0—No fix listedCNA
  • NBG6604 series firmware VendorZyxel Affected 1.00(ABIR.8)C0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:zyxel:nbg6604_firmware:*:*:*:*:*:*:*:*before 1.00\(abir.9\)c0VulnerableZyxel
cpe:2.3:h:zyxel:nbg6604:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:nbg6604_firmware:*:*:*:*:*:*:*:* Versions before 1.00\(abir.9\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:nbg6604:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-35035
  2. 2026-10-03 Alias added: GHSA-778x-386c-73gw
  3. 2026-10-19 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2023-16201 OS command injection in Zyxel NBG6604 firmware CVSS 3.1HIGH 8.8
  • TI-2023-09057 OS command injection in Zyxel NBG6604 firmware CVSS 3.1HIGH 8.8
  • TI-2021-14000 Insufficient session expiration in Zyxel NBG6604 series firmware CVSS 3.1CRITICAL 9.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences