How severe is CVE-2001-1549?

CVE-2001-1549 has a CVSS 2.0 base score of 2.1, rated low severity.

Is CVE-2001-1549 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1549?

CVE-2001-1549 primarily affects Tiny Software Tiny Personal Firewall. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-1549?

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

When was CVE-2001-1549 published?

CVE-2001-1549 was published on 2001-12-31 and last updated on 2026-06-16.

CVE-2001-1549

CVE-2001-1549 is a low-severity vulnerability in Tiny Software Tiny Personal Firewall 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: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Tiny Software Tiny Personal Firewall
Published: 2001-12-31
Last modified: 2026-06-16

Description

Tiny Personal Firewall 1.0 and 2.0 allows local users to bypass filtering via non-standard TCP packets created with non-Windows protocol adapters.

Frequently asked questions

What is CVE-2001-1549?: Tiny Personal Firewall 1.0 and 2.0 allows local users to bypass filtering via non-standard TCP packets created with non-Windows protocol adapters.
How severe is CVE-2001-1549?: CVE-2001-1549 has a CVSS 2.0 base score of 2.1, rated low severity.
Is CVE-2001-1549 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1549?: CVE-2001-1549 primarily affects Tiny Software Tiny Personal Firewall. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-1549?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-1549 published?: CVE-2001-1549 was published on 2001-12-31 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:tiny_software:tiny_personal_firewall:1.0:*:*:*:*:*:*:*
cpe:2.3:a:tiny_software:tiny_personal_firewall:2.0:*:*:*:*:*:*:*

More vulnerabilities in Tiny Software Tiny Personal Firewall

CVE-2002-1925 — Medium (CVSS 5.0): Tiny Personal Firewall 3.0 through 3.0.6 allows remote attackers to cause a denial of service (crash) by via SYN, UDP,…
CVE-2002-0349 — Medium (CVSS 4.6): Tiny Personal Firewall (TPF) 2.0.15, under certain configurations, will pop up an alert to the system even when the…

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