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CVE-2018-0174

HIGH
8.6
CVSS Score
Published: March 28, 2018 at 10:00 PM UTC
Updated: June 17, 2026 at 01:30 AM UTC
5 products affected across 1 vendorIOSIOS Xe7600 Series Supervisor Engine 32· also runs on 6 platforms

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Severity
HIGH8.6
Exploitation
CISA KEV
Exploit prediction
EPSS 8%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score7.6%

EPSS (Exploit Prediction Scoring System) estimates a 7.6% chance this CVE is exploited in the wild within the next 30 days — higher than 95% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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).

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Mar 3, 2022
Remediation Due
Mar 17, 2022
1685 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2018-0174

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS· Cisconpm
95%
v ≤ 15.2(4a)ea5v ≤ 15.2(6)e0a12.2(33)sre7a
cisco-7600-series-route-switch-processor-720 (environment) · cisco-7600-series-supervisor-engine-32 (environment) · cisco-7600-series-supervisor-engine-720 (environment) · rockwellautomation-allen-bradley-armorstratix-5700 (environment) · rockwellautomation-allen-bradley-stratix-5400 (environment) · rockwellautomation-allen-bradley-stratix-5410 (environment) · rockwellautomation-allen-bradley-stratix-5700 (environment) · rockwellautomation-allen-bradley-stratix-8000 (environment) · rockwellautomation-allen-bradley-stratix-8300 (environment)
IOS Xe· Cisco
95%
v ≤ 15.2(4a)ea5v ≤ 15.2(6)e0a12.2(33)sre7a
cisco-7600-series-route-switch-processor-720 (environment) · cisco-7600-series-supervisor-engine-32 (environment) · cisco-7600-series-supervisor-engine-720 (environment) · rockwellautomation-allen-bradley-armorstratix-5700 (environment) · rockwellautomation-allen-bradley-stratix-5400 (environment) · rockwellautomation-allen-bradley-stratix-5410 (environment) · rockwellautomation-allen-bradley-stratix-5700 (environment) · rockwellautomation-allen-bradley-stratix-8000 (environment) · rockwellautomation-allen-bradley-stratix-8300 (environment)
7600 Series Route Switch Processor 720· Ciscodevice
80%
All versions
7600 Series Supervisor Engine 32· Ciscodevice
80%
All versions
7600 Series Supervisor Engine 720· Ciscodevice
80%
All versions

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (7)

VDB Entryx_refsource_BIDBroken LinkThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/103554
VDB Entryx_refsource_SECTRACKBroken LinkThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1040591
x_refsource_MISCThird Party AdvisoryUS Government Resource
Source: [email protected]
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
x_refsource_MISCThird Party AdvisoryUS Government Resource
Source: [email protected]
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.tenable.com/security/research/tra-2018-06
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174

SSVC — Action Prioritization

SSVCActiveAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.6HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20

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