Exploitation evidence
Known exploited · CISA KEV listed
Added 2022-03-03. Ransomware campaign use: Unknown.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2022-03-17. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
n/a / Cisco IOS and IOS XE
Default status: Not specified
- affected: Cisco IOS and IOS XE
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- http://www.securityfocus.com/bid/103554
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
- https://www.tenable.com/security/research/tra-2018-06
- http://www.securitytracker.com/id/1040591
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.07608,
"percentile": 0.94633
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.07608,
"percentile": 0.94599
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.07608,
"percentile": 0.94592
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.07608,
"percentile": 0.94589
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.07608,
"percentile": 0.94586
}07 Nov 2026, 00:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-05T03:14:16.920Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "103554",
"tags": [
"vdb-entry",
"x_refsource_BID",
"x_transferred"
],
"url": "http://www.securityfocus.com/bid/103554"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.tenable.com/security/research/tra-2018-06"
},
{
"name": "1040591",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK",
"x_transferred"
],
"url": "http://www.securitytracker.com/id/1040591"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2018-0174",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-11-08T17:23:22.893466Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2022-03-03",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-01-12T22:01:10.567Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco IOS and IOS XE",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Cisco IOS and IOS XE"
}
]
}
],
"datePublic": "2018-03-28T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2018-04-19T13:57:01.000Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "103554",
"tags": [
"vdb-entry",
"x_refsource_BID"
],
"url": "http://www.securityfocus.com/bid/103554"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.tenable.com/security/research/tra-2018-06"
},
{
"name": "1040591",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK"
],
"url": "http://www.securitytracker.com/id/1040591"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "psirt@cisco.com",
"ID": "CVE-2018-0174",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Cisco IOS and IOS XE",
"version": {
"version_data": [
{
"version_value": "Cisco IOS and IOS XE"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "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."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-20"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "103554",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/103554"
},
{
"name": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04",
"refsource": "MISC",
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04"
},
{
"name": "https://www.tenable.com/security/research/tra-2018-06",
"refsource": "MISC",
"url": "https://www.tenable.com/security/research/tra-2018-06"
},
{
"name": "1040591",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1040591"
},
{
"name": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3",
"refsource": "CONFIRM",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3"
},
{
"name": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05",
"refsource": "MISC",
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2018-0174",
"datePublished": "2018-03-28T22:00:00.000Z",
"dateReserved": "2017-11-27T00:00:00.000Z",
"dateUpdated": "2026-01-12T22:01:10.567Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.07608,
"percentile": 0.94577
}05 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.07608,
"percentile": 0.94573
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.07608,
"percentile": 0.94569
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.07608,
"percentile": 0.94558
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.07608,
"percentile": 0.94552
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2018-0174",
"cwes": [
"CWE-20"
],
"dateAdded": "2022-03-03",
"dueDate": "2022-03-17",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2018-0174",
"product": "IOS XE Software",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow for denial-of-service (DoS).",
"vendorProject": "Cisco",
"vulnerabilityName": "Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability"
}