How severe is CVE-2004-0056?

CVE-2004-0056 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2004-0056 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0056?

CVE-2004-0056 primarily affects Nortel Business Communications Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0056?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2004-0056 published?

CVE-2004-0056 was published on 2004-02-17 and last updated on 2026-06-16.

CVE-2004-0056

CVE-2004-0056 is a high-severity vulnerability in Nortel Business Communications Manager with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Nortel Business Communications Manager
Published: 2004-02-17
Last modified: 2026-06-16

Description

Multiple vulnerabilities in the H.323 protocol implementation for Nortel Networks Business Communications Manager (BCM), Succession 1000 IP Trunk and IP Peer Networking, and 802.11 Wireless IP Gateway allow remote attackers to cause a denial of service and possibly execute arbitrary code, as demonstrated by the NISCC/OUSPG PROTOS test suite for the H.225 protocol.

Frequently asked questions

What is CVE-2004-0056?: Multiple vulnerabilities in the H.323 protocol implementation for Nortel Networks Business Communications Manager (BCM), Succession 1000 IP Trunk and IP Peer Networking, and 802.11 Wireless IP Gateway allow remote attackers to cause a denial of service and possibly execute arbitrary code, as demonstrated by the NISCC/OUSPG PROTOS test suite for the H.225 protocol.
How severe is CVE-2004-0056?: CVE-2004-0056 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2004-0056 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0056?: CVE-2004-0056 primarily affects Nortel Business Communications Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0056?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2004-0056 published?: CVE-2004-0056 was published on 2004-02-17 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
cpe:2.3:h:nortel:802.11_wireless_ip_gateway:*:*:*:*:*:*:*:*
cpe:2.3:h:nortel:succession_communication_server_1000:*:*:*:*:*:*:*:*

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