{"id":"CVE-2025-52691","aliases":["EUVD-2025-205544","GHSA-c9vj-8fwr-4gvq"],"status":"published","title":"Upload Arbitrary Files","description":"Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.","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":"2026-11-09","score":0.85655,"percentile":0.99727,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-434"],"published":"2025-12-29T02:15:58Z","modified":"2026-10-07T12:10:00Z","kev":{"date_added":"2026-01-26","due_date":"2026-02-16","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":"Known"},"exploitation":[{"source":"euvd","since":"2026-01-26"},{"source":"kev","since":"2026-01-26"}],"exploits":[{"source":"metasploit","id":"exploit/multi/http/smartermail_guid_file_upload","title":"SmarterTools SmarterMail GUID File Upload Vulnerability","type":"exploit","platform":"Linux,Unix,Windows","date":"2025-10-09","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/multi/http/smartermail_guid_file_upload"},{"source":"pocgithub","id":"DeathShotXD/CVE-2025-52691-APT-PoC","title":"DeathShotXD/CVE-2025-52691-APT-PoC","date":"2025-12-30","url":"https://github.com/DeathShotXD/CVE-2025-52691-APT-PoC"},{"source":"pocgithub","id":"Udyz/CVE-2025-52691","title":"Udyz/CVE-2025-52691","date":"2025-12-30","url":"https://github.com/Udyz/CVE-2025-52691"},{"source":"pocgithub","id":"rxerium/CVE-2025-52691","title":"rxerium/CVE-2025-52691","date":"2025-12-30","url":"https://github.com/rxerium/CVE-2025-52691"},{"source":"pocgithub","id":"you-ssef9/CVE-2025-52691","title":"you-ssef9/CVE-2025-52691","date":"2025-12-30","url":"https://github.com/you-ssef9/CVE-2025-52691"},{"source":"pocgithub","id":"mohammadzarnian1357/Ashwesker-CVE-2025-52691","title":"mohammadzarnian1357/Ashwesker-CVE-2025-52691","date":"2026-01-01","url":"https://github.com/mohammadzarnian1357/Ashwesker-CVE-2025-52691"},{"source":"pocgithub","id":"nxgn-kd01/smartermail-cve-scanner","title":"nxgn-kd01/smartermail-cve-scanner","date":"2026-01-05","url":"https://github.com/nxgn-kd01/smartermail-cve-scanner"},{"source":"pocgithub","id":"watchtowrlabs/watchTowr-vs-SmarterMail-CVE-2025-52691","title":"watchtowrlabs/watchTowr-vs-SmarterMail-CVE-2025-52691","date":"2026-01-08","url":"https://github.com/watchtowrlabs/watchTowr-vs-SmarterMail-CVE-2025-52691"},{"source":"pocgithub","id":"rimbadirgantara/CVE-2025-52691-poc","title":"rimbadirgantara/CVE-2025-52691-poc","date":"2026-01-11","url":"https://github.com/rimbadirgantara/CVE-2025-52691-poc"},{"source":"nuclei","id":"CVE-2025-52691","title":"SmarterMail - Unrestricted File Upload","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-52691.yaml"}],"products":[{"vendor":"smartertools","product":"smartermail"},{"vendor":"smartertools inc.","product":"smartermail"}],"references":[{"url":"https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/","tags":["Third Party Advisory"]},{"url":"https://github.com/watchtowrlabs/watchTowr-vs-SmarterMail-CVE-2025-52691?ref=labs.watchtowr.com","tags":["exploit","Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-52691","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-52691"},{"url":"https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124"},{"url":"https://github.com/advisories/GHSA-c9vj-8fwr-4gvq"}],"sources":{"cve":[{"id":"CVE-2025-52691","title":"Upload Arbitrary Files","description":"Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.","status":"published","published":"2025-12-29T02:15:58.2Z","modified":"2026-02-26T16:07:23.398Z","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-434"],"updated_at":"2026-11-02T14:32:31.309974Z"}],"euvd":[{"id":"EUVD-2025-205544","description":"Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.","status":"published","published":"2025-12-29T02:15:58Z","modified":"2026-02-26T16:07:23Z","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":"2026-01-26","updated_at":"2026-11-02T19:48:25.997368Z"}],"ghsa":[{"id":"GHSA-c9vj-8fwr-4gvq","title":"Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload...","description":"Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.","status":"published","published":"2025-12-29T03:30:26Z","modified":"2026-01-26T21:31:34Z","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-434"],"updated_at":"2026-11-02T15:05:54.711562Z"}],"kev":[{"id":"CVE-2025-52691","title":"SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability","description":"SmarterTools SmarterMail contains an unrestricted upload of file with dangerous type vulnerability that could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.","cwes":["CWE-434"],"kev":{"date_added":"2026-01-26","due_date":"2026-02-16","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":"Known"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2025-52691","description":"Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.","status":"published","published":"2025-12-29T03:15:42.837Z","modified":"2026-10-07T12:10:00.17Z","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-434"],"updated_at":"2026-11-02T14:11:53.683969Z"}]}}