KEV Entry

CVE-2025-52691

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2025-52691

2026-01-26 01:00 CET

Timestamps

2026-01-26

2026-01-26

Scope

SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability | Affected: SmarterTools / SmarterMail | 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. | 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. | Due date: 2026-02-16 | Known ransomware campaign use (KEV): Known | Notes (KEV): 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

References
  • {'id': 'CVE-2025-52691', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-52691'}

a596b19b-3e0c-417b-bd19-0a33c74efd74

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-10-02 08:09 CEST

2026-10-02 08:09 CEST

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-434"
  ],
  "date_added": "2026-01-26",
  "due_date": "2026-02-16",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Known",
  "product": "SmarterMail",
  "vendorProject": "SmarterTools",
  "vulnerabilityName": "SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability"
}
 -
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