CVE-2018-0156
Cisco IOS and IOS XE
Published 28 Mar 2018 · updated 17 Jun 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 3 Mar 2022, with a remediation deadline of 17 Mar 2022 for US federal agencies.
Required action: Apply updates per vendor instructions.
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. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted packet to an affected device on TCP port 4786. Only Smart Install client switches are affected. Cisco devices that are configured as a Smart Install director are not affected by this vulnerability. Cisco Bug IDs: CSCvd40673.
References
- www.securityfocus.com/bid/103569 · Third Party Advisory, VDB Entry
- www.securitytracker.com/id/1040596 · Third Party Advisory, VDB Entry
- ics-cert.us-cert.gov/advisories/ICSA-18-107-04 · Third Party Advisory, US Government Resource
- ics-cert.us-cert.gov/advisories/ICSA-18-107-05 · Third Party Advisory, US Government Resource
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi · Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0156 · US Government Resource