CVE-2026-85425

MOOS-IvP iSay through 24.8.1 contains a remote code execution vulnerability in the SAY_MOOS variable handler that passes unsanitized text to a shell command. Attackers can publish SAY_MOOS messages containing backticks or command substitution syntax to execute arbitrary commands as the iSay process user.

  • Published Sep 3, 2026
  • CVSS 9.3 critical
  • 1.4% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-85425 at the National Vulnerability Database