CVE-2015-7256: Zyxel c1000z Firmware

Medium severity, CVSS 5.9. EPSS: 0.8% chance of exploitation in the next 30 days.

ZyXEL NWA1100-N, NWA1100-NH, NWA1121-NI, NWA1123-AC, and NWA1123-NI access points; P-660HN-51, P-663HN-51, VMG1312-B10A, VMG1312-B30A, VMG1312-B30B, VMG4380-B10A, VMG8324-B10A, VMG8924-B10A, VMG8924-B30A, and VSG1435-B101 DSL CPEs; PMG5318-B20A GPONs; SBG3300-N000, SBG3300-NB00, and SBG3500-N000 small business gateways; GS1900-8 and GS1900-24 switches; and C1000Z, Q1000, FR1000Z, and P8702N project models use non-unique X.509 certificates and SSH host keys.

Affected products

  • Zyxel c1000z Firmware: affected versions not specified
  • Zyxel FR1000Z Firmware: affected versions not specified
  • Zyxel GS1900-24 Firmware: affected versions not specified
  • Zyxel GS1900-8 Firmware: affected versions not specified
  • Zyxel NWA1100-N Firmware: affected versions not specified
  • Zyxel NWA1100-Nh Firmware: affected versions not specified
  • Zyxel NWA1121-Ni Firmware: affected versions not specified
  • Zyxel NWA1123-Ac Firmware: affected versions not specified
  • Zyxel NWA1123-Ni Firmware: affected versions not specified
  • Zyxel P-660hn-51 Firmware: affected versions not specified
  • Zyxel P-663hn-51 Firmware: affected versions not specified
  • Zyxel p8702n Firmware: affected versions not specified
  • Zyxel PMG5318-b20a Firmware: affected versions not specified
  • Zyxel q1000 Firmware: affected versions not specified
  • Zyxel SBG3300-n000 Firmware: affected versions not specified
  • Zyxel SBG3300-NB00 Firmware: affected versions not specified
  • Zyxel SBG3500-n000 Firmware: affected versions not specified
  • Zyxel VMG1312-b10a Firmware: affected versions not specified
  • Zyxel VMG1312-b30a Firmware: affected versions not specified
  • Zyxel VMG1312-b30b Firmware: affected versions not specified
  • Zyxel VMG4380-b10a Firmware: affected versions not specified
  • Zyxel VMG8324-b10a Firmware: affected versions not specified
  • Zyxel VMG8924-b10a Firmware: affected versions not specified
  • Zyxel VMG8924-b30a Firmware: affected versions not specified
  • Zyxel VSG1435-b101 Firmware: affected versions not specified

Published 2017-09-28. Last modified 2026-06-17.