{"cve":"CVE-2021-1542","nvd":{"published":"2021-06-16T18:15:08.473","modified":"2026-06-17T03:32:01.077","status":"Modified","description":"Multiple vulnerabilities in the web-based management interface of Cisco Small Business 220 Series Smart Switches could allow an attacker to do the following: Hijack a user session Execute arbitrary commands as a root user on the underlying operating system Conduct a cross-site scripting (XSS) attack Conduct an HTML injection attack For more information about these vulnerabilities, see the Details section of this advisory.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-287"],"references":["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ciscosb-multivulns-Wwyb7s5E","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ciscosb-multivulns-Wwyb7s5E"],"products":["cisco:sf220-24_firmware","cisco:sf220-24p_firmware","cisco:sf220-48_firmware","cisco:sf220-48p_firmware","cisco:sg220-26_firmware","cisco:sg220-26p_firmware","cisco:sg220-28mp_firmware","cisco:sg220-50_firmware","cisco:sg220-50p_firmware"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-1542","score":0.01387,"percentile":0.72248,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}