How severe is CVE-2000-0380?

CVE-2000-0380 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2000-0380 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0380?

CVE-2000-0380 primarily affects Cisco Ios. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2000-0380?

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-2000-0380 published?

CVE-2000-0380 was published on 2000-04-26 and last updated on 2026-06-16.

CVE-2000-0380

CVE-2000-0380 is a high-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 7.1. Its EPSS exploit-prediction score of 35% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 35% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ios
Published: 2000-04-26
Last modified: 2026-06-16

Description

The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string.

Frequently asked questions

What is CVE-2000-0380?: The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string.
How severe is CVE-2000-0380?: CVE-2000-0380 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2000-0380 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0380?: CVE-2000-0380 primarily affects Cisco Ios. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2000-0380?: 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-2000-0380 published?: CVE-2000-0380 was published on 2000-04-26 and last updated on 2026-06-16.

References

Affected products (39)

cpe:2.3:o:cisco:ios:11.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2\(4\)f1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2\(8\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2\(8\)p:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2\(9\)p:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2\(9\)xa:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2\(10\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2\(10\)bc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2\(17\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.2p:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.3\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.3\(1\)ed:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.3\(1\)t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.3t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(1\)w:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(1\)xa3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(1\)xb:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(1\)xe:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\)xc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\)xd:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\)xf:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\)xg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(3\)t2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(4\)s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(4\)t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(5\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(5\)t1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(6\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(7\)t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(8\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(9\)s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0db:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0t:*:*:*:*:*:*:*

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