CVE-2026-40514 Details
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 entropy, reducing the seed space to approximately 19,000 possible values. An unauthenticated attacker can use the attachment download endpoint as an oracle to determine the seed in use and derive encryption keys and initialization vectors to forge sharing tokens for arbitrary emails, attachments, or file storage contents without prior access to the targeted content.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-40514
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.16 Probability of exploitation activity being observed over the next 30 days (5th percentile)
CVSS score for CVE-2026-40514
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
5.9 Medium
Products affected by CVE-2026-40514
Smartermail 14.2.5704
Smartermail 14.2.5711
Smartermail 14.3.5752
Smartermail 14.4.5801
Smartermail 14.5.5871
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-40514 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 1,969 58.36%
MY 504 14.94%
IN 152 4.51%
GB 138 4.09%
CA 73 2.16%
SG 61 1.81%
BR 60 1.78%
DE 50 1.48%
TH 49 1.45%
IR 45 1.33%

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CVE-2026-40514 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 1,198 69.69%
Business Services 324 18.85%
Telecommunications 166 9.66%
Finance 6 0.35%
Government/Politics 6 0.35%
Healthcare/Wellness 4 0.23%
Retail 3 0.17%
Tourism/Hospitality 3 0.17%
Engineering 2 0.12%
Legal 2 0.12%

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