CVE-2016-6422 — Cisco IOS 12.2(33)SXJ9 on Supervisor Engine 32 and 720 modules for 6500 and 7600 devices mishandles certain operators, flags, and keywords in TCAM share ACLs, which allows remote attackers to bypass intended access restrictions by sending packets that should have been recognized by a filter, aka Bug ID CSCuy64806

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HIGH

Cisco IOS 12.2(33)SXJ9 on Supervisor Engine 32 and 720 modules for 6500 and 7600 devices mishandles certain operators, flags, and keywords in TCAM share ACLs, which allows remote attackers to bypass intended access restrictions by sending packets that should have been recognized by a filter, aka Bug ID CSCuy64806

Published Oct 6, 2016

7.5

HIGH

CVSS 3.0

EPSS 1.50%

Description

Cisco IOS 12.2(33)SXJ9 on Supervisor Engine 32 and 720 modules for 6500 and 7600 devices mishandles certain operators, flags, and keywords in TCAM share ACLs, which allows remote attackers to bypass intended access restrictions by sending packets that should have been recognized by a filter, aka Bug ID CSCuy64806.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.50% 0.01500

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

EPSS probability 0.01500

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	1.50% (0.01500)	73.33th	v5 (v2026.06.15)
Jun 15, 2026	1.50% (0.01500)	70.83th	v5 (v2026.06.15)
Mar 17, 2025	0.19% (0.00194)	39.28th	v4 (v2025.03.14)
Dec 12, 2024	0.30% (0.00298)	70.27th	v3 (v2023.03.01)
Feb 8, 2024	0.30% (0.00298)	68.60th	v3 (v2023.03.01)
Mar 7, 2023	0.30% (0.00298)	64.58th	v3 (v2023.03.01)
Mar 6, 2023	1.14% (0.01136)	59.45th	v2 (v2022.01.01)
Oct 18, 2022	1.14% (0.01136)	58.28th	v2 (v2022.01.01)
Apr 1, 2022	1.14% (0.01136)	56.27th	v2 (v2022.01.01)
Feb 4, 2022	1.14% (0.01136)	34.23th	v2 (v2022.01.01)

Weaknesses (1)

CWE-20

Improper Input Validation

References (3)

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-catalyst
vendor-advisoryx_refsource_CISCOMitigationVendor Advisory
http://www.securityfocus.com/bid/93404
vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1036954
vdb-entryx_refsource_SECTRACK

Link	Providers	Tags
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-catalyst		vendor-advisoryx_refsource_CISCOMitigationVendor Advisory
http://www.securityfocus.com/bid/93404		vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1036954		vdb-entryx_refsource_SECTRACK

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Oct 6, 2016

Updated Aug 6, 2024

Reserved Jul 26, 2016

Link CVE-2016-6422

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2016-6422

Red Hat

Severity n/a

Public date n/a

Links CVE-2016-6422