# CVE-2018-0156

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.

- Page: https://www.vulneraibility.com/cve/CVE-2018-0156
- CVSS: 7.5
- Known exploited: yes, in CISA KEV since 2022-03-03; CISA due date 2022-03-17
- EPSS: 9.36% (percentile 95.5)
- CISA SSVC: exploitation active, automatable yes, technical impact partial (assessed 2024-11-08)
- Weakness: CWE-399
- Published: 2018-03-28

## Affected versions

- Cisco IOS and IOS XE: affected Cisco IOS and IOS XE

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
- [other] https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi
- [other] http://www.securitytracker.com/id/1040596
- [other] http://www.securityfocus.com/bid/103569
- [other] https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0156

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.