{"cve":"CVE-2021-1486","nvd":{"published":"2021-05-06T13:15:10.397","modified":"2026-06-17T03:31:53.333","status":"Modified","description":"A vulnerability in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to enumerate user accounts. This vulnerability is due to the improper handling of HTTP headers. An attacker could exploit this vulnerability by sending authenticated requests to an affected system. A successful exploit could allow the attacker to compare the HTTP responses that are returned by the affected system to determine which accounts are valid user accounts.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-203"],"references":["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-enumeration-64eNnDKy","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-enumeration-64eNnDKy"],"products":["cisco:catalyst_sd-wan_manager","cisco:sd-wan_vmanage"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-1486","score":0.01221,"percentile":0.68711,"date":"2026-10-31"},"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."]}