CVE-2026-25067
SmarterTools SmarterMail < Build 9518 Unauthenticated background-of-the-day Path Coercion
Reported by vulncheck · Published January 29, 2026
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| smartermail | smartertools | 100.0.9518 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| SmarterTools | SmarterMail | 0 |
| SmarterTools | SmarterMail | 0 |
| smartertools | smartermail | 0 |
Timeline
- Jan 29, 2026 EPSS Score (30 in total, the first dated here)
- Jan 29, 2026 CVE Published
- Jan 29, 2026 PoC Published (2 in total, the first dated here)
- Jan 29, 2026 CVE Updated
- Mar 22, 2026 Coalition ESS Score (2 in total, the first dated here)
- May 16, 2026 Security Advisory
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-25067
vulnetix vdb fixes CVE-2026-25067Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-25067/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart