CVE-2017-6666

Name: CVE-2017-6666
Creator: NVD / NIST
Published: 2017-06-13T06:29:00.973+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.32%

Last modified Jun 17, 2026

CVE-2017-6666 is a vulnerability of currently unknown severity. A vulnerability in the forwarding component of Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series Routers could allow an authenticated, local attacker to cause the router to stop forwarding data traffic across Traffic Engineering (TE) tunnels, resulting in a denial of service (DoS) condition. More Information: CSCvd16665. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

A vulnerability in the forwarding component of Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series Routers could allow an authenticated, local attacker to cause the router to stop forwarding data traffic across Traffic Engineering (TE) tunnels, resulting in a denial of service (DoS) condition. More Information: CSCvd16665. Known Affected Releases: 6.2.11.BASE. Known Fixed Releases: 6.1.3 6.1.2 6.3.1.8i.BASE 6.2.11.8i.BASE 6.2.2.9i.BASE 6.1.32.11i.BASE 6.1.31.10i.BASE 6.1.4.3i.BASE.

Metrics

EPSS Probability

0.32%

23.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Ios Xr	6.0.0
Cisco	Ios Xr	6.0.1
Cisco	Ios Xr	6.0_base
Cisco	Ios Xr	6.1.0
Cisco	Ios Xr	6.1.1
Cisco	Ios Xr	6.1.2
Cisco	Ios Xr	6.1.3
Cisco	Ios Xr	6.2.0
Cisco	Ios Xr	6.2.1

References

http://www.securityfocus.com/bid/98987Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038630
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170607-ncsMitigation, Vendor Advisory
http://www.securityfocus.com/bid/98987Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038630
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170607-ncsMitigation, Vendor Advisory

Timeline

Published: Jun 13, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6666?

How severe is CVE-2017-6666?

Severity scoring for CVE-2017-6666 is pending analysis. The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6666?

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-2017-6666?

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

Scan your code now

Source: NVD / NIST