CVE-2025-52691

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2025-06-19 06:04 UTC ReservedThe CVE id was reserved by its CNA
2. 2025-12-29 03:15 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-01-26 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2026-02-16 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-10-07 12:10 UTC Last updatedMost recent change to the record

Details

Published

2025-12-29 03:15 UTC

Last modified

2026-10-07 12:10 UTC

Added to CISA KEV

2026-01-26

Exploit probability

85.7% · EPSS, next 30 days

Weakness

CWE-434 · Unrestricted file upload

Record status

Analyzed

Affected

• Smartertools Smartermail < 100.0.9413

Attack profile CVSS 3.1 · 10.0

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High