What’s Vulnerable › Vulnerabilities

CVE-2018-0257

• Severity: medium (CVSS 4.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-04-19 · updated 2026-06-17
• Weakness: CWE-399

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.

Affected products

• Cisco IOS XE: from 3.18 through 3.18.4; from 16.6 through 16.6.3; from 16.7 (excl.) through 16.7.2; 15.6(2)sp, 16.4, 16.5

References

• http://www.securityfocus.com/bid/103948
• http://www.securitytracker.com/id/1040716
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8
• http://www.securityfocus.com/bid/103948
• http://www.securitytracker.com/id/1040716
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8

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