{"id":"CVE-2021-42071","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-42071","generatedAt":"2026-11-05T01:03:21.828Z","title":"In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command execution via shell metacharacters in the cgi-bin/slogin/login.py User-Agent HTTP header.","description":"In Visual Tools DVR VX16 4.2.28.0, an unauthenticated attacker can achieve remote command execution via shell metacharacters in the cgi-bin/slogin/login.py User-Agent HTTP header.","published":"2021-10-07T17:15:08.000Z","lastModified":"2026-06-17T04:09:16.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-78"],"affected":["visual-tools/dvr vx16 firmware"],"epss":{"score":0.69882,"percentile":0.99373,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2021-07-06","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":50098,"kind":"exploit","title":"Visual Tools DVR VX16 4.2.28.0 - OS Command Injection (Unauthenticated)","url":"https://www.exploit-db.com/exploits/50098","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/50098.txt","file":"exploits/multiple/webapps/50098.txt","published":"2021-07-06","added":"2021-07-06","updated":"2021-10-15","author":"Andrea D\\'Ubaldo","type":"webapps","platform":"multiple","port":null,"verified":false,"codes":["CVE-2021-42071"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 69.9%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://visual-tools.com/","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/50098","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://www.swascan.com/security-advisory-visual-tools-dvr-cve-2021-42071/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://visual-tools.com/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/50098","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.swascan.com/security-advisory-visual-tools-dvr-cve-2021-42071/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-42071","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."}