CVE-2012-4097 — The BGP implementation in Cisco NX-OS does not properly filter segment types in AS paths, which allows remote attackers to cause a denial of service (BGP service reset) via a malformed UPDATE message, aka Bug ID CSCtn13043

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MEDIUM

The BGP implementation in Cisco NX-OS does not properly filter segment types in AS paths, which allows remote attackers to cause a denial of service (BGP service reset) via a malformed UPDATE message, aka Bug ID CSCtn13043

Published Oct 14, 2013

4.3

MEDIUM

CVSS 2.0

EPSS 1.54%

Description

The BGP implementation in Cisco NX-OS does not properly filter segment types in AS paths, which allows remote attackers to cause a denial of service (BGP service reset) via a malformed UPDATE message, aka Bug ID CSCtn13043.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.54% 0.01536

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

EPSS probability 0.01536

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 (12 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	1.54% (0.01536)	73.93th	v5 (v2026.06.15)
Jun 15, 2026	1.54% (0.01536)	71.50th	v5 (v2026.06.15)
Mar 17, 2025	0.44% (0.00443)	61.21th	v4 (v2025.03.14)
Dec 12, 2024	0.18% (0.00181)	56.68th	v3 (v2023.03.01)
Apr 25, 2024	0.15% (0.00155)	51.19th	v3 (v2023.03.01)
Mar 15, 2024	0.14% (0.00143)	49.02th	v3 (v2023.03.01)
Feb 8, 2024	0.13% (0.00129)	46.50th	v3 (v2023.03.01)
Mar 7, 2023	0.19% (0.00186)	54.19th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Sep 17, 2022	1.05% (0.01055)	50.47th	v2 (v2022.01.01)
Apr 1, 2022	1.05% (0.01055)	48.43th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)

Weaknesses (1)

CWE-20

Improper Input Validation

References (2)

http://osvdb.org/98128
vdb-entryx_refsource_OSVDB
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4097
vendor-advisoryx_refsource_CISCOVendor Advisory

Link	Providers	Tags
http://osvdb.org/98128		vdb-entryx_refsource_OSVDB
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-4097		vendor-advisoryx_refsource_CISCOVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Oct 14, 2013

Updated Sep 17, 2024

Reserved Jul 31, 2012

Link CVE-2012-4097

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2012-4097

Red Hat

Severity n/a

Public date n/a

Links CVE-2012-4097