CVE-2013-5536 — Cisco Secure Access Control System (ACS) does not properly implement an incoming-packet firewall rule, which allows remote attackers to cause a denial of service (process crash) via a flood of crafted packets, aka Bug ID CSCui51521

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MEDIUM

Cisco Secure Access Control System (ACS) does not properly implement an incoming-packet firewall rule, which allows remote attackers to cause a denial of service (process crash) via a flood of crafted packets, aka Bug ID CSCui51521

Published Oct 24, 2013

5.0

MEDIUM

CVSS 2.0

EPSS 1.50%

Description

Cisco Secure Access Control System (ACS) does not properly implement an incoming-packet firewall rule, which allows remote attackers to cause a denial of service (process crash) via a flood of crafted packets, aka Bug ID CSCui51521.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.50% 0.01497

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

EPSS probability 0.01497

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	1.50% (0.01497)	73.27th	v5 (v2026.06.15)
Jun 15, 2026	1.50% (0.01497)	70.77th	v5 (v2026.06.15)
Mar 17, 2025	0.44% (0.00438)	60.92th	v4 (v2025.03.14)
Dec 12, 2024	0.13% (0.00134)	50.30th	v3 (v2023.03.01)
Apr 25, 2024	0.11% (0.00115)	44.48th	v3 (v2023.03.01)
Mar 15, 2024	0.11% (0.00106)	41.82th	v3 (v2023.03.01)
Feb 8, 2024	0.10% (0.00096)	38.71th	v3 (v2023.03.01)
Mar 7, 2023	0.16% (0.00156)	50.10th	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 (1)

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5536
vendor-advisoryx_refsource_CISCOVendor Advisory

Link	Providers	Tags
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5536		vendor-advisoryx_refsource_CISCOVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Oct 24, 2013

Updated Sep 16, 2024

Reserved Aug 22, 2013

Link CVE-2013-5536

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2013-5536

Red Hat

Severity n/a

Public date n/a

Links CVE-2013-5536