{"cve":{"cve_id":"CVE-2025-52691","is_kev":true,"kev_date_added":"2026-01-26","kev_vendor_project":"SmarterTools","kev_product":"SmarterMail","kev_vulnerability_name":"SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability","kev_short_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.","kev_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.","kev_due_date":"2026-02-16","kev_known_ransomware":true,"kev_notes":"https://www.smartertools.com/smartermail/release-notes/current ; https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-52691","kev_cwes":["CWE-434"],"epss_score":0.85457,"epss_percentile":0.9969,"epss_as_of":"2026-06-23","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.","published_at":"2025-12-29T02:15:58.200000Z","last_modified_at":null,"cvss_v3_score":10.0,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-434"],"nvd_references":["https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-28T23:27:26.287160Z"},"effective_severity":"CRITICAL","badges":["kev","ransomware","poc","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"smartertools","vendor_name":"SmarterTools","product_slug":"smartermail","product_name":"SmarterMail","version_start":"SmarterMail versions Build 9406 and earlier","version_start_inclusive":true,"version_end":"SmarterMail versions Build 9406 and earlier","version_end_inclusive":true,"cpe23_uri":"cve5:smartertools:smartermail:SmarterMail versions Build 9406 and earlier:SmarterMail versions Build 9406 and earlier"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-52691.yaml","title":"SmarterMail - Unrestricted File Upload","author":"DhiyaneshDK,watchTowr","disclosed_at":null}],"news":[],"references":[{"url":"https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-124/","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2025-12-29T02:15:58.200000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2026-01-26T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"poc_available","at":"2026-06-24T00:29:48.638073Z","label":"Public PoC available","source":"nuclei"},{"type":"cvss_changed","at":"2026-06-28T17:47:31.968567Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:47:31.968567Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:47:31.968567Z","label":"CVSS score revised","source":"cvelistv5"}]}