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Fencer Intel
high 7.5

CVE-2018-0171 kev in the critical feed json

A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacke…

published 2018-03-28 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-0994

cvss
7.5
version 3.1, CNA
cisa kev
Exploited
added 2021-11-03
epss
99.5%
EPSS 99.5% chance of exploitation in 30 days, percentile 99.9%
public exploits
1
Exploit-DB, plus a Nuclei check

Summary

A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition, or to execute arbitrary code on an affected device. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted Smart Install message to an affected device on TCP port 4786. A successful exploit could allow the attacker to cause a buffer overflow on the affected device, which could have the following impacts: Triggering a reload of the device, Allowing the attacker to execute arbitrary code on the device, Causing an indefinite loop on the affected device that triggers a watchdog crash. Cisco Bug IDs: CSCvg76186.

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 9.8

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. First public exploit (EDB-44451)
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
5 y ago
Patch by
2022-05-03 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Cisco, IOS and IOS XE
CISA name
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

99.48% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-44451 Cisco Smart Install - Crash (PoC) dos, 2018-03-29
  • Nuclei template Cisco Smart Install - Configuration Download nuclei detection template

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • n/a Cisco IOS and IOS XE

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel 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.