CVE-2015-4199

Name: CVE-2015-4199
Creator: NVD / NIST
Published: 2015-06-27T10:59:00.143+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.12%

Last modified Jun 17, 2026

CVE-2015-4199 is a vulnerability of currently unknown severity. Race condition in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance Routing Engine (PRE) module on UBR devices allows remote attackers to cause a denial of service (NULL pointer free and module crash) by triggering intermittent connectivity with many IPv6 CPE devices, aka Bug ID CSCug47366.. EPSS estimates a 2.12% chance of exploitation in the next 30 days.

Description

Race condition in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance Routing Engine (PRE) module on UBR devices allows remote attackers to cause a denial of service (NULL pointer free and module crash) by triggering intermittent connectivity with many IPv6 CPE devices, aka Bug ID CSCug47366.

Metrics

EPSS Probability

2.12%

79.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions
Cisco	Ios	15.3s

References

http://tools.cisco.com/security/center/viewAlert.x?alertId=39423Vendor Advisory
http://www.securityfocus.com/bid/75335Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1032692Third Party Advisory, VDB Entry
http://tools.cisco.com/security/center/viewAlert.x?alertId=39423Vendor Advisory
http://www.securityfocus.com/bid/75335Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1032692Third Party Advisory, VDB Entry

Timeline

Published: Jun 27, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-4199?

How severe is CVE-2015-4199?

Severity scoring for CVE-2015-4199 is pending analysis. The EPSS model estimates a 2.12% probability of exploitation in the next 30 days.

How do I fix CVE-2015-4199?

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-2015-4199?

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

Scan your code now

Source: NVD / NIST