CVE-2003-0556

CVE-2003-0556 is a medium-severity vulnerability in Polycom Mgc-100 with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

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.

Frequently asked questions

What is CVE-2003-0556?
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.
How severe is CVE-2003-0556?
CVE-2003-0556 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2003-0556 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-0556?
CVE-2003-0556 primarily affects Polycom Mgc-100. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-0556?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-0556 published?
CVE-2003-0556 was published on 2003-08-18 and last updated on 2026-06-16.

References

Affected products (4)