How severe is CVE-2001-0864?

CVE-2001-0864 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-0864 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0864?

CVE-2001-0864 affects Cisco 12000 Router. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0864?

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-2001-0864 published?

CVE-2001-0864 was published on 2001-12-06 and last updated on 2026-06-16.

CVE-2001-0864

CVE-2001-0864 is a high-severity vulnerability in Cisco 12000 Router with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco 12000 Router
Published: 2001-12-06
Last modified: 2026-06-16

Description

Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not properly handle the implicit "deny ip any any" rule in an outgoing ACL when the ACL contains exactly 448 entries, which can allow some outgoing packets to bypass access restrictions.

Frequently asked questions

What is CVE-2001-0864?: Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not properly handle the implicit "deny ip any any" rule in an outgoing ACL when the ACL contains exactly 448 entries, which can allow some outgoing packets to bypass access restrictions.
How severe is CVE-2001-0864?: CVE-2001-0864 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-0864 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0864?: CVE-2001-0864 affects Cisco 12000 Router. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0864?: 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-2001-0864 published?: CVE-2001-0864 was published on 2001-12-06 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:h:cisco:12000_router:*:*:*:*:*:*:*:*

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