Trend Micro ScanMail for Microsoft Exchange (SMEX) 10.2 before Hot Fix Build 3318 and 11.0 before Hot Fix Build 4180 creates session IDs for the web console using a random number generator with predictable values, which makes it easier for remote attackers to bypass authentication via a brute force attack.
Conclusion & alert: CVE-2015-3326 is rated Low Risk (39/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.36%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-03-30 | 0.58% | 0.36% | -0.23% |
| 2 | 2025-03-29 | 0.36% | 0.58% | +0.23% |
| 3 | 2025-03-17 | — | 0.36% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
: <a href="https://cwe.mitre.org/data/definitions/330.html">CWE-330: Use of Insufficiently Random Values</a>
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| trend_micro | scanmail | 10.2 | cpe:2.3:a:trend_micro:scanmail:10.2:*:*:*:*:microsoft_exchange:*:* |
| trend_micro | scanmail | 11.0 | cpe:2.3:a:trend_micro:scanmail:11.0:*:*:*:*:microsoft_exchange:*:* |