CVE-2018-0173

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2022-03-03. Federal remediation due 2022-03-17.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

7.66% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 94.0% of scored records. A rank, not a probability.

NVD base score

8.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2018-03-28 22:00Z8 YR AGO

Last updated

2026-01-12 22:00Z7 MO AGO

Reserved

2017-11-27

Assigning CNA

cisco

Record state

PUBLISHED

Severity

High (CVSS 8.6)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Weaknesses

• CWE-20Improper Input ValidationClass

Data version

5.2

Document digest

9ad82c316adc40162e25492255a12076c9ddc34357374e05985bef9cd149722e

• tools.cisco.comhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr2x_refsource_CONFIRM
• www.securityfocus.com103545http://www.securityfocus.com/bid/103545vdb-entryx_refsource_BID
• ics-cert.us-cert.govhttps://ics-cert.us-cert.gov/advisories/ICSA-18-107-04x_refsource_MISC
• www.tenable.comhttps://www.tenable.com/security/research/tra-2018-06x_refsource_MISC
• www.securitytracker.com1040591http://www.securitytracker.com/id/1040591vdb-entryx_refsource_SECTRACK
• ics-cert.us-cert.govhttps://ics-cert.us-cert.gov/advisories/ICSA-18-107-05x_refsource_MISC
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0173government-resource