CVE-2017-9853: SMA Sunny Boy 1.5 Firmware

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

An issue was discovered in SMA Solar Technology products. All inverters have a very weak password policy for the user and installer password. No complexity requirements or length requirements are set. Also, strong passwords are impossible due to a maximum of 12 characters and a limited set of characters. NOTE: the vendor reports that the 12-character limit provides "a very high security standard." Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected

Affected products

  • SMA Sunny Boy 1.5 Firmware: affected versions not specified
  • SMA Sunny Boy 2.5 Firmware: affected versions not specified
  • SMA Sunny Boy 3.0 Firmware: affected versions not specified
  • SMA Sunny Boy 3.6 Firmware: affected versions not specified
  • SMA Sunny Boy 3000tl Firmware: affected versions not specified
  • SMA Sunny Boy 3600 Firmware: affected versions not specified
  • SMA Sunny Boy 3600tl Firmware: affected versions not specified
  • SMA Sunny Boy 4.0 Firmware: affected versions not specified
  • SMA Sunny Boy 4000tl Firmware: affected versions not specified
  • SMA Sunny Boy 5.0 Firmware: affected versions not specified
  • SMA Sunny Boy 5000 Firmware: affected versions not specified
  • SMA Sunny Boy 5000tl Firmware: affected versions not specified
  • SMA Sunny Boy Storage 2.5 Firmware: affected versions not specified
  • SMA Sunny Central 1000cp Xt Firmware: affected versions not specified
  • SMA Sunny Central 2200 Firmware: affected versions not specified
  • SMA Sunny Central 500cp Xt Firmware: affected versions not specified
  • SMA Sunny Central 630cp Xt Firmware: affected versions not specified
  • SMA Sunny Central 720cp Xt Firmware: affected versions not specified
  • SMA Sunny Central 760cp Xt Firmware: affected versions not specified
  • SMA Sunny Central 800cp Xt Firmware: affected versions not specified
  • SMA Sunny Central 850cp Xt Firmware: affected versions not specified
  • SMA Sunny Central 900cp Xt Firmware: affected versions not specified
  • SMA Sunny Central Storage 1000 Firmware: affected versions not specified
  • SMA Sunny Central Storage 2200 Firmware: affected versions not specified
  • SMA Sunny Central Storage 2500-Ev Firmware: affected versions not specified
  • and 14 more

Published 2017-08-05. Last modified 2026-06-17.