CVE-2018-0257

Name: CVE-2018-0257
Creator: NVD / NIST
Published: 2018-04-19T20:29:01.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.80%

Last modified Jun 17, 2026

CVE-2018-0257 is a vulnerability of currently unknown severity. A vulnerability in Cisco IOS XE Software running on Cisco cBR Series Converged Broadband Routers could allow an unauthenticated, adjacent attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the incorrect handling of certain DHCP packets. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

A vulnerability in Cisco IOS XE Software running on Cisco cBR Series Converged Broadband Routers could allow an unauthenticated, adjacent attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the incorrect handling of certain DHCP packets. An attacker could exploit this vulnerability by sending certain DHCP packets to a specific segment of an affected device. A successful exploit could allow the attacker to increase CPU usage on the affected device and cause a DoS condition. Cisco Bug IDs: CSCvg73687.

Metrics

EPSS Probability

0.80%

52.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Cisco	Ios Xe	>= 3.18, <= 3.18.4
Cisco	Ios Xe	>= 16.6, <= 16.6.3
Cisco	Ios Xe	> 16.7, <= 16.7.2
Cisco	Ios Xe	15.6\(2\)sp
Cisco	Ios Xe	16.4
Cisco	Ios Xe	16.5

References

http://www.securityfocus.com/bid/103948Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040716Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8Vendor Advisory
http://www.securityfocus.com/bid/103948Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040716Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8Vendor Advisory

Timeline

Published: Apr 19, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0257?

How severe is CVE-2018-0257?

Severity scoring for CVE-2018-0257 is pending analysis. The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0257?

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-2018-0257?

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

Scan your code now

Source: NVD / NIST