{"id":"CVE-2021-20039","aliases":["EUVD-2021-7502","GHSA-58fc-493g-jfwj"],"status":"published","title":"Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert...","description":"Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.78746,"percentile":0.99595,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-78"],"published":"2021-12-08T09:55:21Z","modified":"2026-06-17T03:33:11Z","exploits":[{"source":"metasploit","id":"exploit/linux/http/sonicwall_cve_2021_20039","title":"SonicWall SMA 100 Series Authenticated Command Injection","type":"exploit","platform":"Linux","date":"2021-12-14","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/linux/http/sonicwall_cve_2021_20039"}],"products":[{"vendor":"sonicwall","product":"sma_200_firmware"},{"vendor":"sonicwall","product":"sma_210_firmware"},{"vendor":"sonicwall","product":"sma_400_firmware"},{"vendor":"sonicwall","product":"sma_410_firmware"},{"vendor":"sonicwall","product":"sma_500v_firmware"},{"vendor":"sonicwall","product":"sonicwall sma100"}],"references":[{"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/165563/SonicWall-SMA-100-Series-Authenticated-Command-Injection.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://attackerkb.com/topics/9szJhq46lw/cve-2021-20039/rapid7-analysis","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20039"},{"url":"https://github.com/advisories/GHSA-58fc-493g-jfwj"}],"sources":{"cve":[{"id":"CVE-2021-20039","description":"Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","status":"published","published":"2021-12-08T09:55:21Z","modified":"2025-09-05T17:09:47.136Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-7502","description":"Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","status":"published","published":"2021-12-08T09:55:21Z","modified":"2025-09-05T17:09:47Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:31:46.9428Z"}],"ghsa":[{"id":"GHSA-58fc-493g-jfwj","title":"Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert...","description":"Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","status":"published","published":"2021-12-09T00:01:12Z","modified":"2025-09-05T18:31:09Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:03:30.514996Z"}],"nvd":[{"id":"CVE-2021-20039","description":"Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","status":"published","published":"2021-12-08T10:15:07.903Z","modified":"2026-06-17T03:33:11.5Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}