CVE-2015-3963

Name: CVE-2015-3963
Creator: NVD / NIST
Published: 2015-08-04T01:59:07.357+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.74%

Last modified Jun 17, 2026

CVE-2015-3963 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.74% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

3.74%

88.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-330

Affected Software

Vendor	Product	Versions
Windriver	Vxworks	>= 6.5, <= 6.6
Windriver	Vxworks	>= 6.7, < 6.7.1.1
Windriver	Vxworks	>= 6.8, < 6.8.3
Windriver	Vxworks	>= 6.9, < 6.9.4.4
Windriver	Vxworks	6.6.3
Windriver	Vxworks	6.6.4
Windriver	Vxworks	6.6.4.1
Windriver	Vxworks	7.0

References

http://www.schneider-electric.com/ww/en/download/document/SEVD-2015-162-01Patch, Third Party Advisory
http://www.securityfocus.com/bid/75302Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1032730Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1033181Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-15-169-01Third Party Advisory, US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-15-169-01AThird Party Advisory, US Government Resource
https://security.netapp.com/advisory/ntap-20160324-0001/Third Party Advisory
http://www.schneider-electric.com/ww/en/download/document/SEVD-2015-162-01Patch, Third Party Advisory
http://www.securityfocus.com/bid/75302Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1032730Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1033181Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-15-169-01Third Party Advisory, US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-15-169-01AThird Party Advisory, US Government Resource
https://security.netapp.com/advisory/ntap-20160324-0001/Third Party Advisory

Timeline

Published: Aug 4, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-3963?

How severe is CVE-2015-3963?

Severity scoring for CVE-2015-3963 is pending analysis. The EPSS model estimates a 3.74% probability of exploitation in the next 30 days.

How do I fix CVE-2015-3963?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-3963?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST