{"cve":"CVE-2021-26639","nvd":{"published":"2022-08-17T21:15:08.487","modified":"2026-06-17T03:43:36.667","status":"Modified","description":"This vulnerability is caused by the lack of validation of input values for specific functions if WISA Smart Wing CMS. Remote attackers can use this vulnerability to leak all files in the server without logging in system.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-20","CWE-494"],"references":["https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66875","https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66875"],"products":["wisa:smart_wing_cms"],"source":"nvd","synced_at":"2026-10-19T21:34:18.502168378+00:00"},"epss":{"cve":"CVE-2021-26639","score":0.00464,"percentile":0.40178,"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."]}