How severe is CVE-2001-0861?

CVE-2001-0861 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2001-0861 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0861?

CVE-2001-0861 affects Cisco 12000 Router. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0861?

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

When was CVE-2001-0861 published?

CVE-2001-0861 was published on 2001-12-06 and last updated on 2026-06-16.

CVE-2001-0861

CVE-2001-0861 is a medium-severity vulnerability in Cisco 12000 Router with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (74th 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 and earlier allows remote attackers to cause a denial of service (CPU consumption) by flooding the router with traffic that generates a large number of ICMP Unreachable replies.

Frequently asked questions

What is CVE-2001-0861?: Cisco 12000 with IOS 12.0 and line cards based on Engine 2 and earlier allows remote attackers to cause a denial of service (CPU consumption) by flooding the router with traffic that generates a large number of ICMP Unreachable replies.
How severe is CVE-2001-0861?: CVE-2001-0861 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2001-0861 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0861?: CVE-2001-0861 affects Cisco 12000 Router. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0861?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-0861 published?: CVE-2001-0861 was published on 2001-12-06 and last updated on 2026-06-16.

References

Affected products (1)

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

More vulnerabilities in Cisco 12000 Router

CVE-2001-0864 — High (CVSS 7.5): Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not properly handle the implicit "deny ip any any" rule…
CVE-2001-0865 — High (CVSS 7.5): Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not support the "fragment" keyword in an outgoing ACL,…
CVE-2001-0866 — High (CVSS 7.5): Cisco 12000 with IOS 12.0 and lines card based on Engine 2 does not properly handle an outbound ACL when an input ACL…
CVE-2001-0867 — High (CVSS 7.5): Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not properly filter does not properly filter packet…
CVE-2001-0862 — High (CVSS 7.5): Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not block non-initial packet fragments, which allows…
CVE-2001-0863 — Medium (CVSS 5.0): Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not handle the "fragment" keyword in a compiled ACL…

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