CVE-2015-3326: Trend Micro ScanMail for Microsoft Exchange (SMEX) 10.2 before Hot Fix Build 3318 and 11.0 before Hot Fix Buil

This month

MEDIUM 5.0WATCHLISTDOWNGRADE

CVE-2015-3326 is a medium-severity flaw (CVSS 5.0) affecting scanmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2015-05-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: trend micro

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-05-14 00:59 UTCPublished CVE record published
2026-06-17 00:25 UTCUpdated Record last modified

trend micro scanmail DOWNGRADE

Affected: 10.2 · 11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.2

1. Check installed version

apt-cache policy scanmail || rpm -q scanmail || scanmail --version

2. No fixed release: DOWNGRADE to a release before 10.2 (Debian / Ubuntu)

apt-cache madison scanmail sudo apt install scanmail=<VERSION_BEFORE_10.2> sudo apt-mark hold scanmail

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list scanmail sudo dnf downgrade scanmail-<VERSION_BEFORE_10.2> sudo dnf versionlock add scanmail

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-3326?

scanmail: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-3326 being exploited?

CVE-2015-3326 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-3326 affect?

CVE-2015-3326 affects scanmail. Severity is medium (CVSS 5.0). 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

How urgent is CVE-2015-3326?

Priority 43/100. On your watchlist

Software pages

Microsoft Exchange vulnerabilities · Trend Micro vulnerabilities

Related CVEs

CVE-2019-14688 HIGH 7.0 DOWNGRADE DOWNGRADE Trend Micro has repackaged installers for several Trend Micro products that were found to utilize a version of
CVE-2017-14093 MEDIUM 6.1 DOWNGRADE The Log Query and Quarantine Query pages in Trend Micro ScanMail for Exchange 12.0 are vulnerable to cross sit
CVE-2017-14092 HIGH 8.8 DOWNGRADE The absence of Anti-CSRF tokens in Trend Micro ScanMail for Exchange 12.0 web interface forms could allow an a
CVE-2017-14091 HIGH 7.5 DOWNGRADE A vulnerability in Trend Micro ScanMail for Exchange 12.0 exists in which certain specific installations that
CVE-2017-14090 CRITICAL 9.1 DOWNGRADE A vulnerability in Trend Micro ScanMail for Exchange 12.0 exists in which some communications to the update se

References

← Back to latest CVEs