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Critical · 10.0 Known exploited · Ransomware Scanner template Public exploit CVE-2025-52691 EUVD-2025-205544GHSA-c9vj-8fwr-4gvq

Upload Arbitrary Files

Published Dec 29, 2025 · Updated Feb 26, 2026 · Assigned by CSA

Vendor: SmarterTools Product: SmarterMail

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.

Affected products

VendorProductAffectedFixed
SmarterTools SmarterMail SmarterMail versions Build 9406 and earlier —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

GitHub 8 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 2

References