CVE-1999-1228

High CVSS 7.5

Published 1998-09-27 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-1228, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

Various modems that do not implement a guard time, or are configured with a guard time of 0, can allow remote attackers to execute arbitrary modem commands such as ATH, ATH0, etc., via a "+++" sequence that appears in ICMP packets, the subject of an e-mail message, IRC commands, and others.

Sources

NVD record for CVE-1999-1228

CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P