AEGLIX vulnerability intelligence
CVE-2018-0156
HIGH · CVSS 7.5 · Analyzed
Published: 2018-03-28 · Updated: 2026-06-17 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T11:34:35.118080+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
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.
Patch review priority
Known exploitation: prioritize review
- CISA KEV lists real-world exploitation.
FIRST EPSS: 9.36% · percentile 95.4 · score date 2026-10-27.
EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗
Severity and scoring
- CVSS score
- 7.5 · HIGH
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-20, CWE-399
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Cisco · IOS Software and Cisco IOS XE Software
- Added to catalog
- 2022-03-03
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2022-03-17
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:o:cisco:ios:15.2\(2\)e4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2a\)ja:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:15.2\(2\)e4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:15.2\(2a\)ja:*:*:*:*:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://www.securityfocus.com/bid/103569
Third Party Advisory · VDB Entry
- http://www.securitytracker.com/id/1040596
Third Party Advisory · VDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
Third Party Advisory · US Government Resource
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
Third Party Advisory · US Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi
Vendor Advisory
- http://www.securityfocus.com/bid/103569
Third Party Advisory · VDB Entry
- http://www.securitytracker.com/id/1040596
Third Party Advisory · VDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
Third Party Advisory · US Government Resource
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
Third Party Advisory · US Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi
Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0156
US Government Resource