{"id":"CVE-2021-20022","title":"SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.","summary":"SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-434"],"vendor":"sonicwall","product":"email_security","affected":["email_security < 10.0.9.6103","email_security_appliance_9000_firmware < 10.0.9.6105","email_security_appliance_3300_firmware < 10.0.9.6105","email_security_appliance_4300_firmware < 10.0.9.6105","email_security_appliance_8300_firmware < 10.0.9.6105","email_security_appliance_5000_firmware < 10.0.9.6105","email_security_appliance_7000_firmware < 10.0.9.6105","email_security_appliance_5050_firmware < 10.0.9.6105","email_security_appliance_7050_firmware < 10.0.9.6105","email_security_virtual_appliance < 10.0.9.6105","hosted_email_security < 10.0.9.6103"],"patched":["email_security 10.0.9.6103","email_security_appliance_9000_firmware 10.0.9.6105","email_security_appliance_3300_firmware 10.0.9.6105","email_security_appliance_4300_firmware 10.0.9.6105","email_security_appliance_8300_firmware 10.0.9.6105","email_security_appliance_5000_firmware 10.0.9.6105","email_security_appliance_7000_firmware 10.0.9.6105","email_security_appliance_5050_firmware 10.0.9.6105","email_security_appliance_7050_firmware 10.0.9.6105","email_security_virtual_appliance 10.0.9.6105","hosted_email_security 10.0.9.6103"],"published":"2021-04-09","updated":"2026-10-01","sourceUpdated":"2026-10-01T21:17:15.817","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-20022","references":[{"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0008","label":"PSIRT@sonicwall.com"},{"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0008","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20022","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild","cve.org","exploit-available"],"epss":0.16639,"epssPercentile":0.97004,"kev":true,"kevDateAdded":"2021-11-03","kevDueDate":"2021-11-17","kevRansomware":true,"exploited":true,"exploitAvailable":true,"ssvc":{"exploitation":"active","automatable":"yes","technicalImpact":"total","timestamp":"2026-08-12T03:55:23.619977Z"},"ingestedAt":"2026-08-12T19:54:25.916Z","slug":"CVE-2021-20022","body":"## Overview\n\nSonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.\n\n## Affected\n\n- `email_security < 10.0.9.6103`\n- `email_security_appliance_9000_firmware < 10.0.9.6105`\n- `email_security_appliance_3300_firmware < 10.0.9.6105`\n- `email_security_appliance_4300_firmware < 10.0.9.6105`\n- `email_security_appliance_8300_firmware < 10.0.9.6105`\n- `email_security_appliance_5000_firmware < 10.0.9.6105`\n- `email_security_appliance_7000_firmware < 10.0.9.6105`\n- `email_security_appliance_5050_firmware < 10.0.9.6105`\n- `email_security_appliance_7050_firmware < 10.0.9.6105`\n- `email_security_virtual_appliance < 10.0.9.6105`\n- `hosted_email_security < 10.0.9.6103`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `email_security 10.0.9.6103`\n- `email_security_appliance_9000_firmware 10.0.9.6105`\n- `email_security_appliance_3300_firmware 10.0.9.6105`\n- `email_security_appliance_4300_firmware 10.0.9.6105`\n- `email_security_appliance_8300_firmware 10.0.9.6105`\n- `email_security_appliance_5000_firmware 10.0.9.6105`\n- `email_security_appliance_7000_firmware 10.0.9.6105`\n- `email_security_appliance_5050_firmware 10.0.9.6105`\n- `email_security_appliance_7050_firmware 10.0.9.6105`\n- `email_security_virtual_appliance 10.0.9.6105`\n- `hosted_email_security 10.0.9.6103`","depth":"abyssal","depthScore":73,"depthScoreParts":{"impact":39.6,"likelihood":3.3,"exploitation":25,"ransomware":5},"changes":[{"seq":214708,"id":"CVE-2021-20022","ts":1790888514965,"field":"exploit_available","old":"false","new":"true"}]}