CVE-2025-52691

CVE Enrichment

CVSS: 10.0 CRITICAL
EPSS: 85.66%
EPSS Percentile: 99.73%
CISA KEV: YES — Known Exploited Vulnerability

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
Published: 29-Dec-2025 10:15
Last Modified: 07-Oct-2026 19:10
EPSS Date: 2026-10-31
CWE: CWE-434

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:C /
                            C:H /
                            I:H /
                            A:H

CISA KEV Details

Date Added: 2026-01-26
Remediation Due: 2026-02-16
Known Ransomware Campaign Use: Known
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.
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

CNA Products / Version Status

SmarterTools · SmarterMail Source: CNA · 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
Default status: unknown

SmarterMail versions Build 9406 and earlier — affected

Affected Products / Versions

smartertools / smartermail Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 100.0.9413
cpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:*

References

Last enrichment sync: 09-Nov-2026 03:10
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (2)

CVE-2024-4577 (PHP on Windows), CVE-2026-21514 (Microsoft Word), CVE-2025-32433 (Erlang SSH RCE), CVE-2025-52691 (SmarterMail), and CVE-2025-9316 (N-able N-Central). Rapid7 Reports Middle East Cyber Escalation Fueled by Exploitation and Hacktivist Disruption
Note that this is separate from the ongoing mass exploitation of CVE-2025-52691, an arbitrary file upload vulnerability in SmarterMail that also leads to remote code execution. SmarterMail Account-Takeover Flaw Exploited to Achieve Remote Code Execution

CVE (6)

Threat Actors (7)

MITRE ATT&CK (5)

Vendors (4)

Products (6)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.