How severe is CVE-2003-1527?

CVE-2003-1527 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2003-1527 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-1527?

CVE-2003-1527 primarily affects Ibm Internet Security Systems Blackice Defender. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2003-1527?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2003-1527 published?

CVE-2003-1527 was published on 2003-12-31 and last updated on 2026-06-16.

CVE-2003-1527

CVE-2003-1527 is a medium-severity vulnerability in Ibm Internet Security Systems Blackice Defender with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ibm Internet Security Systems Blackice Defender
Published: 2003-12-31
Last modified: 2026-06-16

Description

BlackICE Defender 2.9.cap and Server Protection 3.5.cdf, when configured to automatically block attacks, allows remote attackers to block IP addresses and cause a denial of service via spoofed packets.

Frequently asked questions

What is CVE-2003-1527?: BlackICE Defender 2.9.cap and Server Protection 3.5.cdf, when configured to automatically block attacks, allows remote attackers to block IP addresses and cause a denial of service via spoofed packets.
How severe is CVE-2003-1527?: CVE-2003-1527 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2003-1527 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1527?: CVE-2003-1527 primarily affects Ibm Internet Security Systems Blackice Defender. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-1527?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-1527 published?: CVE-2003-1527 was published on 2003-12-31 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:ibm:internet_security_systems_blackice_defender:2.9cap:*:*:*:*:*:*:*
cpe:2.3:a:iss:blackice_server_protection:3.5.cdf:*:*:*:*:*:*:*