CVE-2001-0866 — Cisco 12000 with IOS 12.0 and lines card based on Engine 2 does not properly handle an outbound ACL when an input ACL is not configured on all the interfaces of a multi port line card, which could allow remote attackers to bypass the intended access controls

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HIGH

Cisco 12000 with IOS 12.0 and lines card based on Engine 2 does not properly handle an outbound ACL when an input ACL is not configured on all the interfaces of a multi port line card, which could allow remote attackers to bypass the intended access controls

Published Mar 9, 2002

7.5

HIGH

CVSS 2.0

EPSS 1.71%

Description

Cisco 12000 with IOS 12.0 and lines card based on Engine 2 does not properly handle an outbound ACL when an input ACL is not configured on all the interfaces of a multi port line card, which could allow remote attackers to bypass the intended access controls.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.71% 0.01711

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01711

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.71% (0.01711)	76.52th	v5 (v2026.06.15)
Jun 15, 2026	1.71% (0.01711)	74.30th	v5 (v2026.06.15)
Mar 17, 2025	0.45% (0.00447)	61.41th	v4 (v2025.03.14)
Dec 12, 2024	0.34% (0.00338)	72.21th	v3 (v2023.03.01)
Feb 8, 2024	0.34% (0.00338)	70.56th	v3 (v2023.03.01)
Mar 7, 2023	0.34% (0.00338)	66.77th	v3 (v2023.03.01)
Mar 6, 2023	1.21% (0.01213)	66.61th	v2 (v2022.01.01)
Feb 17, 2023	1.21% (0.01213)	66.22th	v2 (v2022.01.01)
Apr 1, 2022	1.21% (0.01213)	64.21th	v2 (v2022.01.01)
Feb 4, 2022	1.21% (0.01213)	40.54th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (5)

http://www.ciac.org/ciac/bulletins/m-018.shtml
third-party-advisorygovernment-resourcex_refsource_CIAC
http://www.cisco.com/warp/public/707/GSR-ACL-pub.shtml
vendor-advisoryx_refsource_CISCO
http://www.iss.net/security_center/static/7554.php
vdb-entryx_refsource_XF
http://www.osvdb.org/1984
vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/bid/3537
vdb-entryx_refsource_BID

Link	Providers	Tags
http://www.ciac.org/ciac/bulletins/m-018.shtml		third-party-advisorygovernment-resourcex_refsource_CIAC
http://www.cisco.com/warp/public/707/GSR-ACL-pub.shtml		vendor-advisoryx_refsource_CISCO
http://www.iss.net/security_center/static/7554.php		vdb-entryx_refsource_XF
http://www.osvdb.org/1984		vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/bid/3537		vdb-entryx_refsource_BID

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Mar 9, 2002

Updated Aug 8, 2024

Reserved Nov 22, 2001

Link CVE-2001-0866

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2001-0866

Red Hat

Severity n/a

Public date n/a

Links CVE-2001-0866