CVE-2016-6391

Name: CVE-2016-6391
Creator: NVD / NIST
Published: 2016-10-05T20:59:06.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.94%

Last modified Jun 17, 2026

CVE-2016-6391 is a vulnerability of currently unknown severity. Cisco IOS 12.2 and 15.0 through 15.3 allows remote attackers to cause a denial of service (traffic-processing outage) via a crafted series of Common Industrial Protocol (CIP) requests, aka Bug ID CSCur69036.. EPSS estimates a 1.94% chance of exploitation in the next 30 days.

Description

Cisco IOS 12.2 and 15.0 through 15.3 allows remote attackers to cause a denial of service (traffic-processing outage) via a crafted series of Common Industrial Protocol (CIP) requests, aka Bug ID CSCur69036.

Metrics

EPSS Probability

1.94%

77.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.2\(44\)ex
Cisco	Ios	12.2\(44\)ex1
Cisco	Ios	12.2\(46\)se
Cisco	Ios	12.2\(46\)se1
Cisco	Ios	12.2\(46\)se2
Cisco	Ios	12.2\(50\)se
Cisco	Ios	12.2\(50\)se1
Cisco	Ios	12.2\(50\)se2
Cisco	Ios	12.2\(50\)se3
Cisco	Ios	12.2\(50\)se4
Cisco	Ios	12.2\(50\)se5
Cisco	Ios	12.2\(52\)se
Cisco	Ios	12.2\(52\)se1
Cisco	Ios	12.2\(55\)se
Cisco	Ios	12.2\(55\)se3
Cisco	Ios	12.2\(55\)se4
Cisco	Ios	12.2\(55\)se5
Cisco	Ios	12.2\(55\)se6
Cisco	Ios	12.2\(55\)se7
Cisco	Ios	12.2\(55\)se8
Cisco	Ios	12.2\(55\)se9
Cisco	Ios	12.2\(55\)se10
Cisco	Ios	12.2\(58\)se2
Cisco	Ios	15.0\(1\)ey
Cisco	Ios	15.0\(1\)ey1
Cisco	Ios	15.0\(1\)ey2
Cisco	Ios	15.0\(2\)eb
Cisco	Ios	15.0\(2\)ey
Cisco	Ios	15.0\(2\)ey1
Cisco	Ios	15.0\(2\)ey2
Cisco	Ios	15.0\(2\)ey3
Cisco	Ios	15.0\(2\)se
Cisco	Ios	15.0\(2\)se1
Cisco	Ios	15.0\(2\)se2
Cisco	Ios	15.0\(2\)se3
Cisco	Ios	15.0\(2\)se4
Cisco	Ios	15.0\(2\)se5
Cisco	Ios	15.0\(2\)se6
Cisco	Ios	15.0\(2\)se7
Cisco	Ios	15.0\(2\)se9
Cisco	Ios	15.2\(1\)ey
Cisco	Ios	15.2\(2\)e
Cisco	Ios	15.2\(2\)e1
Cisco	Ios	15.2\(2\)e2
Cisco	Ios	15.2\(2\)e4
Cisco	Ios	15.2\(3\)ea
Cisco	Ios	15.3\(3\)ja
Cisco	Ios	15.3\(3\)ja1
Cisco	Ios	15.3\(3\)ja1m
Cisco	Ios	15.3\(3\)ja1n

Showing 50 of 85 affected configurations. See NVD for the full list.

References

Timeline

Published: Oct 5, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-6391?

How severe is CVE-2016-6391?

Severity scoring for CVE-2016-6391 is pending analysis. The EPSS model estimates a 1.94% probability of exploitation in the next 30 days.

How do I fix CVE-2016-6391?

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.

How Strix Helps

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Source: NVD / NIST