{"id":"CVE-2021-28149","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-28149","generatedAt":"2026-10-28T06:49:22.583Z","title":"Hongdian H8922 3.0.5 devices allow Directory Traversal.","description":"Hongdian H8922 3.0.5 devices allow Directory Traversal. The /log_download.cgi log export handler does not validate user input and allows a remote attacker with minimal privileges to download any file from the device by substituting ../ (e.g., ../../etc/passwd) This can be carried out with a web browser by changing the file name accordingly. Upon visiting log_download.cgi?type=../../etc/passwd and logging in, the web server will allow a download of the contents of the /etc/passwd file.","published":"2021-05-06T16:15:07.000Z","lastModified":"2026-06-17T03:45:53.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-22"],"affected":["hongdian/h8922 firmware"],"epss":{"score":0.1592,"percentile":0.96878,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 15.9%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://en.hongdian.com/Products/Details/H8922","tags":["Product","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://en.hongdian.com/Products/Details/H8922","tags":["Product","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-28149","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."}