{"id":"CVE-2021-20042","aliases":["EUVD-2021-7505","GHSA-7jhp-ff4f-8fx7"],"status":"published","title":"An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary...","description":"An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.03682,"percentile":0.89828,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-441","CWE-610"],"published":"2021-12-08T09:55:25Z","modified":"2026-06-17T03:33:11Z","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":"https://nvd.nist.gov/vuln/detail/CVE-2021-20042"},{"url":"https://github.com/advisories/GHSA-7jhp-ff4f-8fx7"}],"sources":{"cve":[{"id":"CVE-2021-20042","description":"An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","status":"published","published":"2021-12-08T09:55:25Z","modified":"2024-08-03T17:30:07.516Z","cwes":["CWE-441"],"updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-7505","description":"An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","status":"published","published":"2021-12-08T09:55:25Z","modified":"2024-08-03T17:30:07Z","updated_at":"2026-11-03T03:25:09.841069Z"}],"ghsa":[{"id":"GHSA-7jhp-ff4f-8fx7","title":"An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary...","description":"An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","status":"published","published":"2021-12-09T00:01:12Z","modified":"2023-06-27T23:07:43Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-441","CWE-610"],"updated_at":"2026-11-02T14:54:39.385813Z"}],"nvd":[{"id":"CVE-2021-20042","description":"An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.","status":"published","published":"2021-12-08T10:15:08.053Z","modified":"2026-06-17T03:33:11.903Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-441"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}