CVE-2011-1651 — Cisco IOS XR 3.9.x and 4.0.x before 4.0.3 and 4.1.x before 4.1.1, when an SPA interface processor is installed, allows remote attackers to cause a denial of service (device reload) via a crafted IPv4 packet, aka Bug ID CSCto45095

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HIGH

Cisco IOS XR 3.9.x and 4.0.x before 4.0.3 and 4.1.x before 4.1.1, when an SPA interface processor is installed, allows remote attackers to cause a denial of service (device reload) via a crafted IPv4 packet, aka Bug ID CSCto45095

Published May 31, 2011

7.8

HIGH

CVSS 2.0

EPSS 1.21%

Description

Cisco IOS XR 3.9.x and 4.0.x before 4.0.3 and 4.1.x before 4.1.1, when an SPA interface processor is installed, allows remote attackers to cause a denial of service (device reload) via a crafted IPv4 packet, aka Bug ID CSCto45095.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.21% 0.01210

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

EPSS probability 0.01210

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	1.21% (0.01210)	67.33th	v5 (v2026.06.15)
Jun 15, 2026	1.21% (0.01210)	64.33th	v5 (v2026.06.15)
Mar 17, 2025	0.43% (0.00427)	60.26th	v4 (v2025.03.14)
Dec 12, 2024	0.18% (0.00181)	56.68th	v3 (v2023.03.01)
Jun 25, 2024	0.18% (0.00181)	55.56th	v3 (v2023.03.01)
Mar 7, 2023	0.18% (0.00181)	53.55th	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-399

References (2)

http://www.cisco.com/en/US/products/products_security_advisory09186a0080b7f191.shtml
vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securitytracker.com/id?1025567
vdb-entryx_refsource_SECTRACK

Link	Providers	Tags
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b7f191.shtml		vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securitytracker.com/id?1025567		vdb-entryx_refsource_SECTRACK

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published May 31, 2011

Updated Aug 6, 2024

Reserved Apr 5, 2011

Link CVE-2011-1651

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2011-1651

Red Hat

Severity n/a

Public date n/a

Links CVE-2011-1651