CVE-2025-52691
Upload Arbitrary Files
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Upload Arbitrary Files
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.
- Record
CVE-2025-52691- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
EUVDEUVD-2025-205544
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.
- Record
EUVD-2025-205544- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c9vj-8fwr-4gvq
Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload...
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.
- Record
GHSA-c9vj-8fwr-4gvq- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
CISA KEV No score
SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability
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.
- Record
CVE-2025-52691- Weakness
- CWE-434
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-52691- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | SmarterTools SmarterMail GUID File Upload Vulnerability | 2025-10-09 |
| PoC in GitHub | DeathShotXD/CVE-2025-52691-APT-PoC | 2025-12-30 |
| PoC in GitHub | Udyz/CVE-2025-52691 | 2025-12-30 |
| PoC in GitHub | rxerium/CVE-2025-52691 | 2025-12-30 |
| PoC in GitHub | you-ssef9/CVE-2025-52691 | 2025-12-30 |
| PoC in GitHub | mohammadzarnian1357/Ashwesker-CVE-2025-52691 | 2026-01-01 |
| PoC in GitHub | nxgn-kd01/smartermail-cve-scanner | 2026-01-05 |
| PoC in GitHub | watchtowrlabs/watchTowr-vs-SmarterMail-CVE-2025-52691 | 2026-01-08 |
| PoC in GitHub | rimbadirgantara/CVE-2025-52691-poc | 2026-01-11 |
| Nuclei | SmarterMail - Unrestricted File Upload |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation, exploits | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-52691 is a critical vulnerability (CVSS 10.0) in Smartertools Smartermail, published December 29, 2025. CISA lists it as known to be exploited, since January 26, 2026. EUVD reports exploitation since January 26, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 85.7%, the 99th percentile. No source names a fixed version.