CVE-2011-4007 — Cisco IOS 15.0 and 15.1 and IOS XE 3.x do not properly handle the "set mpls experimental imposition" command, which allows remote attackers to cause a denial of service (device crash) via network traffic that triggers (1) fragmentation or (2) reassembly, aka Bug ID CSCtr56576

Back Back to CVE browser

MEDIUM

Cisco IOS 15.0 and 15.1 and IOS XE 3.x do not properly handle the "set mpls experimental imposition" command, which allows remote attackers to cause a denial of service (device crash) via network traffic that triggers (1) fragmentation or (2) reassembly, aka Bug ID CSCtr56576

Published May 2, 2012

5.4

MEDIUM

CVSS 2.0

EPSS 1.19%

Description

Cisco IOS 15.0 and 15.1 and IOS XE 3.x do not properly handle the "set mpls experimental imposition" command, which allows remote attackers to cause a denial of service (device crash) via network traffic that triggers (1) fragmentation or (2) reassembly, aka Bug ID CSCtr56576.

Remediation

No remediation recorded yet.

Metrics

1.19% 0.01189

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

EPSS probability 0.01189

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 (11 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	1.19% (0.01189)	66.81th	v5 (v2026.06.15)
Jun 15, 2026	1.20% (0.01203)	64.14th	v5 (v2026.06.15)
Mar 17, 2025	0.43% (0.00427)	60.26th	v4 (v2025.03.14)
Dec 12, 2024	0.20% (0.00204)	59.26th	v3 (v2023.03.01)
Jun 21, 2024	0.20% (0.00204)	58.60th	v3 (v2023.03.01)
Mar 23, 2023	0.20% (0.00204)	56.60th	v3 (v2023.03.01)
Mar 7, 2023	0.26% (0.00257)	61.68th	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://www.cisco.com/en/US/docs/ios/ios_xe/3/release/notes/asr1k_caveats_33s.html
x_refsource_CONFIRM
http://www.securitytracker.com/id?1027005
vdb-entryx_refsource_SECTRACK

Link	Providers	Tags
http://www.cisco.com/en/US/docs/ios/ios_xe/3/release/notes/asr1k_caveats_33s.html		x_refsource_CONFIRM
http://www.securitytracker.com/id?1027005		vdb-entryx_refsource_SECTRACK

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published May 2, 2012

Updated Aug 6, 2024

Reserved Oct 6, 2011

Link CVE-2011-4007

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2011-4007

Red Hat

Severity n/a

Public date n/a

Links CVE-2011-4007