CVE-2007-3925: Ipswitch IMail Server IMAP service buffer overflows via Search commands

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 18 September 2026. Confidence: medium.

high priorityRemote authenticated code execution in an internet-facing mail service with a very high EPSS score warrants prompt patching despite the medium CVSS 2.0 base score.

What it is

Ipswitch IMail Server 2006 before 2006.21 contains multiple buffer overflows in the IMAP service (imapd32.exe) reachable through the Search and Search Charset commands. A remote authenticated user can trigger the overflow and execute arbitrary code on the mail server.

Impact

An attacker with valid IMAP credentials gains remote code execution on the mail server, typically running with the privileges of the IMAP service account. This can lead to full compromise of the mail server and any data or credentials it holds.

Attack surface

Reached over the network through the IMAP service on the mail server; the CVSS vector (AV:N/AC:L/Au:S) and description indicate a valid authenticated account is required, with no user interaction beyond sending crafted Search commands.

Exploitation

Not listed in CISA KEV and no public exploit tag appears in the references, but EPSS is very high (0.84673, 99.7th percentile), indicating elevated predicted exploitation activity.

What to do

• Upgrade Ipswitch IMail Server to 2006.21 or later, which the vendor release notes identify as the fixed release.
• Restrict IMAP access to trusted networks or VPN and disable the service where it is not required.
• Enforce strong unique credentials and monitor for anomalous or brute-forced IMAP logins that could supply the required authenticated access.
• Segment the mail server so that code execution there does not expose broader internal systems.
• Apply vendor advisory guidance from Secunia and SecurityFocus references for any interim workarounds.

Detection

• Monitor IMAP logs for malformed or unusually long Search and Search Charset commands.
• Alert on imapd32.exe crashes or unexpected process terminations on the mail server.
• Watch for child processes or outbound connections spawned by the IMAP service, which would indicate successful code execution.
• Correlate IMAP authentication events with subsequent suspicious process activity on the same host.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.