How severe is CVE-2001-1548?

CVE-2001-1548 has a CVSS 2.0 base score of 2.1, rated low severity.

Is CVE-2001-1548 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1548?

CVE-2001-1548 primarily affects Zonelabs Zonealarm. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-1548?

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

When was CVE-2001-1548 published?

CVE-2001-1548 was published on 2001-12-31 and last updated on 2026-06-16.

CVE-2001-1548

CVE-2001-1548 is a low-severity vulnerability in Zonelabs Zonealarm with a CVSS 2.0 base score of 2.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 2.0 base score 2.1)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zonelabs Zonealarm
Published: 2001-12-31
Last modified: 2026-06-16

Description

ZoneAlarm 2.1 through 2.6 and ZoneAlarm Pro 2.4 and 2.6 allows local users to bypass filtering via non-standard TCP packets created with non-Windows protocol adapters.

Frequently asked questions

What is CVE-2001-1548?: ZoneAlarm 2.1 through 2.6 and ZoneAlarm Pro 2.4 and 2.6 allows local users to bypass filtering via non-standard TCP packets created with non-Windows protocol adapters.
How severe is CVE-2001-1548?: CVE-2001-1548 has a CVSS 2.0 base score of 2.1, rated low severity.
Is CVE-2001-1548 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1548?: CVE-2001-1548 primarily affects Zonelabs Zonealarm. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-1548?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-1548 published?: CVE-2001-1548 was published on 2001-12-31 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:zonelabs:zonealarm:2.1:*:*:*:*:*:*:*
cpe:2.3:a:zonelabs:zonealarm:2.2:*:*:*:*:*:*:*
cpe:2.3:a:zonelabs:zonealarm:2.3:*:*:*:*:*:*:*
cpe:2.3:a:zonelabs:zonealarm:2.4:*:*:*:*:*:*:*
cpe:2.3:a:zonelabs:zonealarm:2.4:*:pro:*:*:*:*:*
cpe:2.3:a:zonelabs:zonealarm:2.5:*:*:*:*:*:*:*
cpe:2.3:a:zonelabs:zonealarm:2.6:*:*:*:*:*:*:*
cpe:2.3:a:zonelabs:zonealarm:2.6:*:pro:*:*:*:*:*

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