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Fencer Vulns
high 8.6

CVE-2018-0174 kev in the critical feed json

A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenti…

published 2018-03-28 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-0997

cvss
8.6
version 3.1, CNA
cisa kev
Exploited
added 2022-03-03
epss
7.6%
EPSS 7.6% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-107-04 updated cvss 8.6

Rockwell Automation Stratix and ArmorStratix Switches

  • Rockwell Automation Allen-Bradley ArmorStratix 5700 Industrial Managed Ethernet Switches for extreme environments <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 5400 Industrial Ethernet Switches <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 5410 Industrial Distribution Switches <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 5700 Industrial Managed Ethernet Switches <= 15.2(6)E0a Rockwell Automation Allen-Bradley Stratix 8000 Modular Managed Ethernet Switches <= 15.2(6)E0a
    affected: mitigation “Rockwell Automation recommends users upgrade to FRN 15.2(6)E1 or later.” rockwellautomation.custhelp.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. CISA SSVC: exploitation active

Known exploited

Added
4 y ago
Patch by
2022-03-17 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Cisco, IOS XE Software
CISA name
Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
partial
Assessed
1 y ago

Exploit prediction

7.61% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • n/a Cisco IOS and IOS XE

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.