How severe is CVE-2015-3963?

This vulnerability has a severity rating of MEDIUM with a CVSS score of 5.8 out of 10.

What type of vulnerability is CVE-2015-3963?

This is classified as CWE-330, which is a common weakness in software security.

CVE-2015-3963 - MEDIUM Severity | CVSS 5.8

Vulnerability Description

Wind River VxWorks before 5.5.1, 6.5.x through 6.7.x before 6.7.1.1, 6.8.x before 6.8.3, 6.9.x before 6.9.4.4, and 7.x before 7 ipnet_coreip 1.2.2.0, as used on Schneider Electric SAGE RTU devices before J2 and other devices, does not properly generate TCP initial sequence number (ISN) values, which makes it easier for remote attackers to spoof TCP sessions by predicting an ISN value.

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