PT-2026-5247 · Smartertools · Smartermail

Cale Black · Published 2026-01-22 · Updated 2026-01-30 · CVE-2026-25067

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions SmarterTools SmarterMail versions prior to build 9518

Description The application base64-decodes attacker-supplied input and uses it as a filesystem path without validation. This affects the background-of-the-day preview endpoint. 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. The vulnerability allows an attacker to provide input that is then used as a filesystem path without proper validation.

Recommendations Update SmarterTools SmarterMail to build 9518 or later.

Fix

Weakness Enumeration

CWE-706

Related Identifiers

BDU:2026-01227

CVE-2026-25067

Affected Products

Smartermail

References · 11

• https://smartertools.com/smartermail/release-notes/current · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-25067 · Security Note
• https://osv.dev/vulnerability/CVE-2026-25067 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01227 · Security Note
• https://t.me/cveNotify/150239 · Telegram Post
• https://twitter.com/CVEnew/status/2016737969529307584 · Twitter Post
• https://vulncheck.com/advisories/smartertools-smartermail-unauthenticated-background-of-the-day-path-coercion · Note
• https://twitter.com/ThreatSynop/status/2017164786409082917 · Twitter Post
• https://smartertools.com/smartermail/release-notes/2026#/9518 · Note
• https://reddit.com/r/pwnhub/comments/1qra05e/critical_rce_flaws_in_smartermail_prompt_urgent · Reddit Post
• https://t.me/CVEtracker/43216 · Telegram Post