The DHCP relay subsystem of Cisco IOS 12.2 through 15.6 and Cisco IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code and gain full control of an affected system. The attacker could also cause an affected system to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a buffer overflow condition in the DHCP relay subsystem of the affected software. An attacker could exploit this vulnerability by sending a crafted DHCP Version 4 (DHCPv4) packet to an affected system. A successful exploit could allow the attacker to execute arbitrary code and gain full control of the affected system or cause the affected system to reload, resulting in a DoS condition. Cisco Bug IDs: CSCsm45390, CSCuw77959.

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Fixes

Solution

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History

Wed, 22 Oct 2025 00:15:00 +0000


Tue, 21 Oct 2025 20:30:00 +0000


Tue, 21 Oct 2025 19:30:00 +0000


Fri, 15 Nov 2024 18:15:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2022-03-03'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-01-12T21:47:19.251Z

Reserved: 2017-08-03T00:00:00.000Z

Link: CVE-2017-12240

cve-icon Vulnrichment

Updated: 2024-08-05T18:28:16.785Z

cve-icon NVD

Status : Deferred

Published: 2017-09-29T01:34:49.077

Modified: 2026-01-12T22:16:01.103

Link: CVE-2017-12240

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses