CVE-2018-0171

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 99.48%
EPSS Percentile: 99.94%
CISA KEV: YES — Known Exploited Vulnerability

Description

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: psirt@cisco.com
Published: 29-Mar-2018 05:29
Last Modified: 17-Jun-2026 08:29
EPSS Date: 2026-10-11
CWE: CWE-20, CWE-787

CVSS Vector


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

CISA KEV Details

Date Added: 2021-11-03
Remediation Due: 2022-05-03
Known Ransomware Campaign Use: Unknown
Required Action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2018-0171

Affected Products / Versions

cisco / ios
Version / affected range: 15.2\(5\)e
cpe:2.3:o:cisco:ios:15.2\(5\)e:*:*:*:*:*:*:*

References

Last enrichment sync: 12-Oct-2026 16:18
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

The group actively exploits a seven-year-old vulnerability (CVE-2018-0171), which was patched at the time of the vulnerability publications, in Cisco IOS software's Smart Install feature, targeting unpatched and Static Tundra Targets Unpatched Cisco Network Devices in Long-Running Espionage Campaign

Malware (1)

Threat Actors (2)

MITRE ATT&CK (8)

Vendors (1)

Products (3)

Industries (3)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.