CVE-2017-3207
CVSS v3
9.8
CRITICAL
EPSS Score
8.2 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
The Java implementations of AMF3 deserializers in WebORB for Java by Midnight Coders, version 5.1.1.0, derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.
Technical details
- Published
- 2018-06-11
Frequently asked questions
What is CVE-2017-3207?
The Java implementations of AMF3 deserializers in WebORB for Java by Midnight Coders, version 5.1.1.0, derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.
Is CVE-2017-3207 actively exploited?
Active exploitation of CVE-2017-3207 has not been confirmed. Its EPSS score was 8.2% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2017-3207?
CVE-2017-3207 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2017-3207 affecting your environment?
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