CVE-2012-1324 — Race condition in the Zone-Based Firewall in Cisco IOS 15.1 and 15.2, when IPS policies are configured, allows remote attackers to cause a denial of service (device crash) by sending IPv6 packets, aka Bug ID CSCtk53534

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HIGH

Race condition in the Zone-Based Firewall in Cisco IOS 15.1 and 15.2, when IPS policies are configured, allows remote attackers to cause a denial of service (device crash) by sending IPv6 packets, aka Bug ID CSCtk53534

Published May 3, 2012

7.1

HIGH

CVSS 2.0

EPSS 1.26%

Description

Race condition in the Zone-Based Firewall in Cisco IOS 15.1 and 15.2, when IPS policies are configured, allows remote attackers to cause a denial of service (device crash) by sending IPv6 packets, aka Bug ID CSCtk53534.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.26% 0.01261

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

EPSS probability 0.01261

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	1.26% (0.01261)	68.56th	v5 (v2026.06.15)
Jun 15, 2026	1.28% (0.01276)	66.04th	v5 (v2026.06.15)
Mar 17, 2025	0.31% (0.00309)	51.89th	v4 (v2025.03.14)
Dec 12, 2024	0.20% (0.00204)	59.26th	v3 (v2023.03.01)
Jun 25, 2024	0.20% (0.00204)	58.63th	v3 (v2023.03.01)
Mar 24, 2023	0.20% (0.00204)	56.62th	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-362

Race Condition

References (2)

http://www.cisco.com/en/US/docs/ios/15_1/release/notes/151-3TCAVS.html
x_refsource_CONFIRM
https://exchange.xforce.ibmcloud.com/vulnerabilities/75414
vdb-entryx_refsource_XF

Link	Providers	Tags
http://www.cisco.com/en/US/docs/ios/15_1/release/notes/151-3TCAVS.html		x_refsource_CONFIRM
https://exchange.xforce.ibmcloud.com/vulnerabilities/75414		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published May 3, 2012

Updated Aug 6, 2024

Reserved Feb 27, 2012

Link CVE-2012-1324

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2012-1324

Red Hat

Severity n/a

Public date n/a

Links CVE-2012-1324