What is CVE-2026-40514?

CVE-2026-40514 is a medium-severity vulnerability in Smartertools Smartermail, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 5.9/10. Published 2026-04-27.

How severe is CVE-2026-40514?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Smartertools Smartermail

CVE-2026-40514

SmarterTools SmarterMail builds prior to 9610 contain a cryptographic weakness in the file and email sharing endpoints that use DES-CBC encryption with keys and initialization vectors derived from System.Random seeded with insufficient ent…

EPSS: 0.000 (10.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Smartertools Smartermail
Smartertools Inc. Smartermail — versions 0

Weakness classification (CWE)

CWE-338 — Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

References

disclosure@vulncheck.com (release-notes, Release Notes, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-40514?: CVE-2026-40514 is a medium-severity vulnerability in Smartertools Smartermail, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 5.9/10. Published 2026-04-27.
How severe is CVE-2026-40514?: Medium severity. CVSS v3 base score is 5.9 out of 10.