This indicates an attack attempt against a Buffer Overflow vulnerability in Zope.
The vulnerability is caused by an error when the software handles a maliciously crafted post request. It allows a remote attacker to execute arbitrary command within the context of the application.
Zope 2.12.x prior to version 2.12.20
Zope 2.13.x prior to version 2.13.10
System Compromise: Remote attackers can gain control of vulnerable systems
Apply the most recent upgrade or patch from the vendor.