{"id":"CVE-2025-20393","aliases":["EUVD-2025-203911","GHSA-mrgj-cg36-fgq8"],"status":"published","title":"Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability","description":"A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to execute arbitrary system commands on an affected device with root privileges.\r\n\r\nThis vulnerability is due to insufficient validation of HTTP requests by the Spam Quarantine feature. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with\u0026nbsp;root privileges.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.32392,"percentile":0.98351,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-20"],"published":"2025-12-17T16:47:13Z","modified":"2026-10-07T19:22:07Z","kev":{"date_added":"2025-12-17","due_date":"2025-12-24","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2025-12-17"},{"source":"kev","since":"2025-12-17"}],"exploits":[{"source":"pocgithub","id":"KingHacker353/CVE-2025-20393","title":"KingHacker353/CVE-2025-20393","date":"2025-12-18","url":"https://github.com/KingHacker353/CVE-2025-20393"},{"source":"pocgithub","id":"StasonJatham/cisco-sa-sma-attack-N9bf4","title":"StasonJatham/cisco-sa-sma-attack-N9bf4","date":"2025-12-18","url":"https://github.com/StasonJatham/cisco-sa-sma-attack-N9bf4"},{"source":"pocgithub","id":"cyberleelawat/CVE-2025-20393","title":"cyberleelawat/CVE-2025-20393","date":"2025-12-18","url":"https://github.com/cyberleelawat/CVE-2025-20393"},{"source":"pocgithub","id":"redpack-kr/Blackash-CVE-2025-20393","title":"redpack-kr/Blackash-CVE-2025-20393","date":"2025-12-28","url":"https://github.com/redpack-kr/Blackash-CVE-2025-20393"},{"source":"pocgithub","id":"cyberdudebivash/CYBERDUDEBIVASH-Cisco-AsyncOS-CVE-2025-20393-Scanner","title":"cyberdudebivash/CYBERDUDEBIVASH-Cisco-AsyncOS-CVE-2025-20393-Scanner","date":"2026-01-16","url":"https://github.com/cyberdudebivash/CYBERDUDEBIVASH-Cisco-AsyncOS-CVE-2025-20393-Scanner"}],"products":[{"vendor":"cisco","product":"asyncos"},{"vendor":"cisco","product":"cisco secure email"},{"vendor":"cisco","product":"cisco secure email and web manager"},{"vendor":"cisco","product":"multiple products"}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20393","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-20393"},{"url":"https://github.com/advisories/GHSA-mrgj-cg36-fgq8"}],"sources":{"cve":[{"id":"CVE-2025-20393","title":"Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability","description":"A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to execute arbitrary system commands on an affected device with root privileges.\r\n\r\nThis vulnerability is due to insufficient validation of HTTP requests by the Spam Quarantine feature. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with\u0026nbsp;root privileges.","status":"published","published":"2025-12-17T16:47:13.128Z","modified":"2026-10-07T19:22:07.139Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:32:25.5658Z"}],"euvd":[{"id":"EUVD-2025-203911","description":"A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to execute arbitrary system commands on an affected device with root privileges.\r\n\r\nThis vulnerability is due to insufficient validation of HTTP requests by the Spam Quarantine feature. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with\u0026nbsp;root privileges.","status":"published","published":"2025-12-17T16:47:13Z","modified":"2026-10-07T19:22:07Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"exploited_since":"2025-12-17","updated_at":"2026-11-02T17:27:34.353796Z"}],"ghsa":[{"id":"GHSA-mrgj-cg36-fgq8","title":"Cisco is aware of a potential vulnerability.\u0026nbsp; Cisco is currently investigating and\u0026nbsp;will...","description":"Cisco is aware of a potential vulnerability.\u0026nbsp; Cisco is currently investigating and\u0026nbsp;will update these details as appropriate\u0026nbsp;as more information becomes available.","status":"published","published":"2025-12-17T18:31:33Z","modified":"2025-12-17T21:30:47Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:05:15.153655Z"}],"kev":[{"id":"CVE-2025-20393","title":"Cisco Multiple Products Improper Input Validation Vulnerability","description":"Cisco Secure Email Gateway, Secure Email, AsyncOS Software, and Web Manager appliances contains an improper input validation vulnerability that allows threat actors to execute arbitrary commands with root privileges on the underlying operating system of an affected appliance.","cwes":["CWE-20"],"kev":{"date_added":"2025-12-17","due_date":"2025-12-24","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2025-20393","description":"A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to execute arbitrary system commands on an affected device with root privileges.\r\n\r\nThis vulnerability is due to insufficient validation of HTTP requests by the Spam Quarantine feature. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with\u0026nbsp;root privileges.","status":"published","published":"2025-12-17T17:15:48.523Z","modified":"2026-06-17T08:41:39.983Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:11:51.309584Z"}]}}