How severe is CVE-2026-25067?

CVE-2026-25067 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-25067 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25067?

CVE-2026-25067 affects Smartertools Smartermail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25067?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-25067 have an EU (EUVD) identifier?

Yes. CVE-2026-25067 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4974.

When was CVE-2026-25067 published?

CVE-2026-25067 was published on 2026-01-29 and last updated on 2026-06-17.

CVE-2026-25067

CVE-2026-25067 is a medium-severity vulnerability in Smartertools Smartermail with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-706.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4974
Weakness: CWE-706
Affected product: Smartertools Smartermail
Published: 2026-01-29
Last modified: 2026-06-17

Description

SmarterTools SmarterMail versions prior to build 9518 contain an unauthenticated path coercion vulnerability in the background-of-the-day preview endpoint. The application base64-decodes attacker-supplied input and uses it as a filesystem path without validation. On Windows systems, this allows UNC paths to be resolved, causing the SmarterMail service to initiate outbound SMB authentication attempts to attacker-controlled hosts. This can be abused for credential coercion, NTLM relay attacks, and unauthorized network authentication.

Frequently asked questions

What is CVE-2026-25067?: SmarterTools SmarterMail versions prior to build 9518 contain an unauthenticated path coercion vulnerability in the background-of-the-day preview endpoint. The application base64-decodes attacker-supplied input and uses it as a filesystem path without validation. On Windows systems, this allows UNC paths to be resolved, causing the SmarterMail service to initiate outbound SMB authentication attempts to attacker-controlled hosts. This can be abused for credential coercion, NTLM relay attacks, and unauthorized network authentication.
How severe is CVE-2026-25067?: CVE-2026-25067 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-25067 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25067?: CVE-2026-25067 affects Smartertools Smartermail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25067?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-25067 have an EU (EUVD) identifier?: Yes. CVE-2026-25067 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4974.
When was CVE-2026-25067 published?: CVE-2026-25067 was published on 2026-01-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:*

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