Description
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.
Published: 2017-09-28
Score: 9.8 Critical
EPSS: 12.3% Moderate
KEV: Yes
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories

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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'}


Subscriptions

Cisco 1000 Integrated Services Router 1100-4g Integrated Services Router 1100-4gltegb Integrated Services Router 1100-4gltena Integrated Services Router 1100-4p Integrated Services Router 1100-6g Integrated Services Router 1100-8p Integrated Services Router 1100-lte Integrated Services Router 1100 Integrated Services Router 1101-4p Integrated Services Router 1101 Integrated Services Router 1109-2p Integrated Services Router 1109-4p Integrated Services Router 1109 Integrated Services Router 1111x-8p Integrated Services Router 1111x Integrated Services Router 111x Integrated Services Router 1120 Integrated Services Router 1131 Integrated Services Router 1160 Integrated Services Router 1801 Integrated Service Router 1802 Integrated Service Router 1803 Integrated Service Router 1811 Integrated Service Router 1812 Integrated Service Router 1841 Integrated Service Router 1861 Integrated Service Router 1905 Integrated Services Router 1906c Integrated Services Router 1921 Integrated Services Router 1941 Integrated Services Router 1941w Integrated Services Router 4000 Integrated Services Router 4221 Integrated Services Router 422 Integrated Services Router 8101-32fh 8101-32h 8102-64h 8201 8201-32fh 8202 8208 8212 8218 8800 12-slot 8800 18-slot 8800 4-slot 8800 8-slot 8804 8808 8812 8818 8831 9800-40 9800-80 9800-cl 9800-l Asr 1000 Asr 1000-esp100 Asr 1000-esp100-x Asr 1000-esp200-x Asr 1000-x Asr 1001 Asr 1001-hx Asr 1001-hx R Asr 1001-x Asr 1001-x R Asr 1002 Asr 1002-hx Asr 1002-hx R Asr 1002-x Asr 1002-x R Asr 1004 Asr 1006 Asr 1006-x Asr 1009-x Asr 1013 Asr 1023 Asr 900 Asr 9000 Asr 9000v Asr 9001 Asr 9006 Asr 901-12c-f-d Asr 901-12c-ft-d Asr 901-4c-f-d Asr 901-4c-ft-d Asr 901-6cz-f-a Asr 901-6cz-f-d Asr 901-6cz-fs-a Asr 901-6cz-fs-d Asr 901-6cz-ft-a Asr 901-6cz-ft-d Asr 9010 Asr 901s-2sg-f-ah Asr 901s-2sg-f-d Asr 901s-3sg-f-ah Asr 901s-3sg-f-d Asr 901s-4sg-f-d Asr 902 Asr 902u Asr 903 Asr 907 Asr 914 Asr 920-10sz-pd Asr 920-10sz-pd R Asr 920-10sz-pd Router Asr 920-12cz-a Asr 920-12cz-a R Asr 920-12cz-a Router Asr 920-12cz-d Asr 920-12cz-d R Asr 920-12cz-d Router Asr 920-12sz-im Asr 920-12sz-im R Asr 920-12sz-im Router Asr 920-24sz-im Asr 920-24sz-im R Asr 920-24sz-im Router Asr 920-24sz-m Asr 920-24sz-m R Asr 920-24sz-m Router Asr 920-24tz-m Asr 920-24tz-m R Asr 920-24tz-m Router Asr 920-4sz-a Asr 920-4sz-a R Asr 920-4sz-a Router Asr 920-4sz-d Asr 920-4sz-d R Asr 920-4sz-d Router Asr 920u-12sz-im Asr 9901 Asr 9902 Asr 9903 Asr 9904 Asr 9906 Asr 9910 Asr 9912 Asr 9920 Asr 9922 Catalyst 3650 Catalyst 3650-12x48fd-e Catalyst 3650-12x48fd-l Catalyst 3650-12x48fd-s Catalyst 3650-12x48uq Catalyst 3650-12x48uq-e Catalyst 3650-12x48uq-l Catalyst 3650-12x48uq-s Catalyst 3650-12x48ur Catalyst 3650-12x48ur-e Catalyst 3650-12x48ur-l Catalyst 3650-12x48ur-s Catalyst 3650-12x48uz Catalyst 3650-12x48uz-e Catalyst 3650-12x48uz-l Catalyst 3650-12x48uz-s Catalyst 3650-24pd Catalyst 3650-24pd-e Catalyst 3650-24pd-l Catalyst 3650-24pd-s Catalyst 3650-24pdm Catalyst 3650-24pdm-e Catalyst 3650-24pdm-l Catalyst 3650-24pdm-s Catalyst 3650-24ps-e Catalyst 3650-24ps-l Catalyst 3650-24ps-s Catalyst 3650-24td-e Catalyst 3650-24td-l Catalyst 3650-24td-s Catalyst 3650-24ts-e Catalyst 3650-24ts-l Catalyst 3650-24ts-s Catalyst 3650-48fd-e Catalyst 3650-48fd-l Catalyst 3650-48fd-s Catalyst 3650-48fq Catalyst 3650-48fq-e Catalyst 3650-48fq-l Catalyst 3650-48fq-s Catalyst 3650-48fqm Catalyst 3650-48fqm-e Catalyst 3650-48fqm-l Catalyst 3650-48fqm-s Catalyst 3650-48fs-e Catalyst 3650-48fs-l Catalyst 3650-48fs-s Catalyst 3650-48pd-e Catalyst 3650-48pd-l Catalyst 3650-48pd-s Catalyst 3650-48pq-e Catalyst 3650-48pq-l Catalyst 3650-48pq-s Catalyst 3650-48ps-e Catalyst 3650-48ps-l Catalyst 3650-48ps-s Catalyst 3650-48td-e Catalyst 3650-48td-l Catalyst 3650-48td-s Catalyst 3650-48tq-e Catalyst 3650-48tq-l Catalyst 3650-48tq-s Catalyst 3650-48ts-e Catalyst 3650-48ts-l Catalyst 3650-48ts-s Catalyst 3650-8x24pd-e Catalyst 3650-8x24pd-l Catalyst 3650-8x24pd-s Catalyst 3650-8x24uq Catalyst 3650-8x24uq-e Catalyst 3650-8x24uq-l Catalyst 3650-8x24uq-s Catalyst 3850 Catalyst 3850-12s-e Catalyst 3850-12s-s Catalyst 3850-12x48u Catalyst 3850-12xs-e Catalyst 3850-12xs-s Catalyst 3850-16xs-e Catalyst 3850-16xs-s Catalyst 3850-24p-e Catalyst 3850-24p-l Catalyst 3850-24p-s Catalyst 3850-24pw-s Catalyst 3850-24s-e Catalyst 3850-24s-s Catalyst 3850-24t-e Catalyst 3850-24t-l Catalyst 3850-24t-s Catalyst 3850-24u Catalyst 3850-24u-e Catalyst 3850-24u-l Catalyst 3850-24u-s Catalyst 3850-24xs Catalyst 3850-24xs-e Catalyst 3850-24xs-s Catalyst 3850-24xu Catalyst 3850-24xu-e Catalyst 3850-24xu-l Catalyst 3850-24xu-s Catalyst 3850-32xs-e Catalyst 3850-32xs-s Catalyst 3850-48f-e Catalyst 3850-48f-l Catalyst 3850-48f-s Catalyst 3850-48p-e Catalyst 3850-48p-l Catalyst 3850-48p-s Catalyst 3850-48pw-s Catalyst 3850-48t-e Catalyst 3850-48t-l Catalyst 3850-48t-s Catalyst 3850-48u Catalyst 3850-48u-e Catalyst 3850-48u-l Catalyst 3850-48u-s Catalyst 3850-48xs Catalyst 3850-48xs-e Catalyst 3850-48xs-f-e Catalyst 3850-48xs-f-s Catalyst 3850-48xs-s Catalyst 3850-nm-2-40g Catalyst 3850-nm-8-10g Ios
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