CVE-2003-0556: Polycom Mgc-100

Medium severity, CVSS 5.0. EPSS: 1.3% chance of exploitation in the next 30 days.

Polycom MGC 25 allows remote attackers to cause a denial of service (crash) via a large number of "user" requests to the control port 5003, as demonstrated using the blast TCP stress tester.

Affected products

• Polycom Mgc-100: any version
• Polycom Mgc-25: version 5.51.21 only; version 5.51.211 only
• Polycom Mgc-50: any version

Published 2003-08-18. Last modified 2026-06-16.