Vulnerability Intelligence Report
Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability
CVE-2018-0174
A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of option 82 information that it receives in DHCP Version 4 (DHCPv4) packets from DHCP relay agents. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuh91645.
CISA KEV
SSVC: Active Exploitation
Automatable
CVSS Base Score
8.6
HIGH
Exploitability:3.9
Impact Score:4.0
EPSS Probability:7.61%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-20 ↗CWE-20
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| cisco | ios | 12.2\(33\)sre7a |
| cisco | ios_xe | 12.2\(33\)sre7a |
| cisco | 7600_series_route_switch_processor_720 | all |
| cisco | 7600_series_supervisor_engine_32 | all |
| cisco | 7600_series_supervisor_engine_720 | all |
| rockwellautomation | allen-bradley_stratix_8300 | all |
| rockwellautomation | allen-bradley_armorstratix_5700 | all |
| rockwellautomation | allen-bradley_stratix_5400 | all |
| rockwellautomation | allen-bradley_stratix_5410 | all |
| rockwellautomation | allen-bradley_stratix_5700 | all |
| rockwellautomation | allen-bradley_stratix_8000 | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Cisco Systems, Inc. · Hosted Service · USA |
| Reserved | 2017-11-27T00:00:00 |
| Published | 2018-03-28T22:00:00 |
| Patch Date | 2018-03-28 |
| Last Updated | 2026-01-12T22:01:10 |
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