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SmarterTools

SmarterTools SmarterMail Unrestricted File Upload Vulnerability

CVE-2025-52691

What this means

This is rated critical severity (10 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Smartertools Smartermail is in your estate, and treat that as the priority.

Full vendor 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.

Scoring and exploitation

10.0/ 10
CVSS 3.1 base scoreCritical

Exploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality, integrity and availability, and it can reach beyond the vulnerable system.

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

Exploitability

Longer bar: easier to attack

Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredNonePR:N
User interactionNoneUI:N
ScopeChangedS:C

Impact

Longer bar: more harm

ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
Elevated attack likelihood (~85.7% in 30 days)Model estimate (): a probability signal, not confirmed exploitation
Exploited in the wild
Yes — confirmed exploitation (US CISA )
Known
Listed product
SmarterTools SmarterMail

Weaknesses

CWE-434

Affected products ()

  • Smartertools Smartermail
Show the raw CPE strings (1)
  • cpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:*

References

3 links from the CVE record, grouped by site.

Related feed events

  • SmarterTools SmarterMail Unrestricted File Upload Vulnerability

    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…

    Next step: Confirm whether SmarterTools SmarterMail is in your estate.

    Who's reporting

    1 of 3 perspectives

    Official authority: Official 1Vendor statement missing. no VendorResearcher coverage missing. no Researcher1 signal

    Only official coverage so far. Treat as an early signal.

    SmarterTools SmarterMail
    CVE-2025-52691