{"id":"CVE-2021-21740","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-21740","generatedAt":"2026-10-27T20:21:08.891Z","title":"There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product.","description":"There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product. The attacker could insert the USB disk with the symbolic link into the residential gateway, and access unauthorized directory information through the symbolic link, causing information leak.","published":"2021-08-09T16:15:07.000Z","lastModified":"2026-06-17T03:36:04.000Z","status":"Modified","sourceIdentifier":"psirt@zte.com.cn","cvss":{"version":"3.1","score":2.4,"severity":"LOW","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-59"],"affected":["zte/zxhn h2640 firmware"],"epss":{"score":0.00442,"percentile":0.38133,"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":"low","text":"Lower severity and a low EPSS score (0.44%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1017244","tags":["Vendor Advisory"],"source":"psirt@zte.com.cn"},{"url":"https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1017244","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-21740","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."}