{"id":"CVE-2021-26620","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-26620","generatedAt":"2026-10-27T22:33:58.561Z","title":"An improper authentication vulnerability leading to information leakage was discovered in iptime NAS2dual.","description":"An improper authentication vulnerability leading to information leakage was discovered in iptime NAS2dual. Remote attackers are able to steal important information in the server by exploiting vulnerabilities such as insufficient authentication when accessing the shared folder and changing user’s passwords.","published":"2022-03-25T19:15:09.000Z","lastModified":"2026-06-17T03:43:35.000Z","status":"Modified","sourceIdentifier":"vuln@krcert.or.kr","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-287"],"affected":["iptime/nas101 firmware","iptime/nas1dual firmware","iptime/nas2dual firmware","iptime/nas3 firmware","iptime/nas4 firmware","iptime/nas4dual firmware","iptime/nas-i firmware","iptime/nas-ii firmware","iptime/nas-iie firmware"],"epss":{"score":0.0135,"percentile":0.71312,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66578","tags":["Third Party Advisory"],"source":"vuln@krcert.or.kr"},{"url":"https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66578","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-26620","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}