CVE-1999-0700: Buffer overflow in Microsoft Phone Dialer (dialer.exe), via a malformed dialer entry in the dialer.ini file.

Security readout for executives and security teams

CVE-1999-0700 is an old buffer overflow in Microsoft Phone Dialer. A malformed entry in dialer.ini can cause unsafe behavior in dialer.exe. The source bundle does not identify affected versions, business impact, or current exploitation, so treat it as a legacy-asset verification issue rather than an internet-wide emergency. Likely limited to legacy Windows environments where Microsoft Phone Dialer and its dialer.ini configuration remain installed or accessible. The bundle lists affected vendor and product as n/a, so exact exposure cannot be confirmed from these sources alone. Prioritize discovery on legacy Windows assets. The issue is old and not KEV-listed, but unsupported systems with obsolete Microsoft components can create unmanaged risk. Escalate only if the component is present in sensitive environments. Mitigation focus: Review MS99-026 and Q237185 for the official Microsoft remediation.; Inventory legacy systems for Microsoft Phone Dialer and dialer.ini.; Remove or disable unused Phone Dialer where vendor guidance permits..

Prepared

Jul 12, 2026, 06:27 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.