How severe is CVE-2001-0203?

CVE-2001-0203 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2001-0203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0203?

CVE-2001-0203 primarily affects Watchguard Firebox Ii. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-0203?

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

When was CVE-2001-0203 published?

CVE-2001-0203 was published on 2001-03-26 and last updated on 2026-06-16.

CVE-2001-0203

CVE-2001-0203 is a critical-severity vulnerability in Watchguard Firebox Ii with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Watchguard Firebox Ii
Published: 2001-03-26
Last modified: 2026-06-16

Description

Watchguard Firebox II firewall allows users with read-only access to gain read-write access, and administrative privileges, by accessing a file that contains hashed passphrases, and using the hashes during authentication.

Frequently asked questions

What is CVE-2001-0203?: Watchguard Firebox II firewall allows users with read-only access to gain read-write access, and administrative privileges, by accessing a file that contains hashed passphrases, and using the hashes during authentication.
How severe is CVE-2001-0203?: CVE-2001-0203 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2001-0203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0203?: CVE-2001-0203 primarily affects Watchguard Firebox Ii. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-0203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2001-0203 published?: CVE-2001-0203 was published on 2001-03-26 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:h:watchguard:firebox_ii:4.0:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_ii:4.1:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_ii:4.2:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_ii:4.3:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_ii:4.4:*:*:*:*:*:*:*
cpe:2.3:h:watchguard:firebox_ii:4.5:*:*:*:*:*:*:*

More vulnerabilities in Watchguard Firebox Ii

CVE-2001-0592 — Medium (CVSS 5.0): Watchguard Firebox II prior to 4.6 allows a remote attacker to create a denial of service in the kernel via a large…
CVE-2001-0204 — Medium (CVSS 5.0): Watchguard Firebox II allows remote attackers to cause a denial of service by establishing multiple connections and…
CVE-2000-1182 — Medium (CVSS 5.0): WatchGuard Firebox II allows remote attackers to cause a denial of service by flooding the Firebox with a large number…

All CVEs affecting Watchguard Firebox Ii →