CVE-2007-5256: Mcdu Fsd

High severity, CVSS 7.5. EPSS: 7.1% chance of exploitation in the next 30 days.

Multiple stack-based buffer overflows in FSD 2.052 d9 and earlier, and FSFDT FSD 3.000 d9 and earlier, allow (1) remote attackers to execute arbitrary code via a long HELP command on TCP port 3010 to the sysuser::exechelp function in sysuser.cc and (2) remote authenticated users to execute arbitrary code via long commands on TCP port 6809 to the servinterface::sendmulticast function in servinterface.cc, as demonstrated by a PIcallsign command.

Affected products

• Mcdu Fsd: version 2.052_d9 only; version 3.000_d9 only

Published 2007-10-06. Last modified 2026-06-16.