CVE-2011-0943 — Cisco IOS XR 3.8.3, 3.8.4, and 3.9.1 allows remote attackers to cause a denial of service (NetIO process restart or device reload) via a crafted IPv4 packet, aka Bug ID CSCth44147

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HIGH

Cisco IOS XR 3.8.3, 3.8.4, and 3.9.1 allows remote attackers to cause a denial of service (NetIO process restart or device reload) via a crafted IPv4 packet, aka Bug ID CSCth44147

Published May 31, 2011

7.8

HIGH

CVSS 2.0

EPSS 1.21%

Description

Cisco IOS XR 3.8.3, 3.8.4, and 3.9.1 allows remote attackers to cause a denial of service (NetIO process restart or device reload) via a crafted IPv4 packet, aka Bug ID CSCth44147.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.21% 0.01205

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

EPSS probability 0.01205

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	1.21% (0.01205)	67.20th	v5 (v2026.06.15)
Jun 15, 2026	1.21% (0.01205)	64.20th	v5 (v2026.06.15)
Mar 17, 2025	0.43% (0.00427)	60.26th	v4 (v2025.03.14)
Dec 12, 2024	0.16% (0.00161)	54.06th	v3 (v2023.03.01)
Apr 25, 2024	0.14% (0.00137)	48.64th	v3 (v2023.03.01)
Mar 15, 2024	0.13% (0.00127)	46.29th	v3 (v2023.03.01)
Feb 8, 2024	0.11% (0.00115)	43.86th	v3 (v2023.03.01)
Mar 7, 2023	0.16% (0.00161)	50.92th	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 (1)

http://www.cisco.com/en/US/products/products_security_advisory09186a0080b7f18e.shtml
vendor-advisoryx_refsource_CISCOVendor Advisory

Link	Providers	Tags
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b7f18e.shtml		vendor-advisoryx_refsource_CISCOVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published May 31, 2011

Updated Sep 16, 2024

Reserved Feb 10, 2011

Link CVE-2011-0943

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2011-0943

Red Hat

Severity n/a

Public date n/a

Links CVE-2011-0943