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Vulnerability record · CVE-2013-5536 · published 24 October 2013

CVE-2013-5536: Cisco secure access control system improper input validation vulnerability

Cisco · Secure Access Control System

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.

5.0 CVSS 2.0 Medium EPSS 1.5% · top 26.7% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-0147Cisco Secure Access Control System Java deserialization RCECisco Secure Access Control System (ACS) before release 5.8 patch 9 deserializes user-supplied content insecurely, allowing a crafted serialized Java…KEVEPSS 18%analysed10.0CVE-2014-0650Cisco secure access control system improper input validation vulnerabilityThe web interface in Cisco Secure Access Control System (ACS) 5.x before 5.4 Patch 3 allows remote attackers to execute arbitrary operating-system co…EPSS 3.4%10.0CVE-2014-0648Cisco secure access control system permissions and access controls vulnerabilityThe RMI interface in Cisco Secure Access Control System (ACS) 5.x before 5.5 does not properly enforce authentication and authorization requirements,…EPSS 5.9%9.8CVE-2018-0253Cisco secure access control system improper input validation vulnerabilityA vulnerability in the ACS Report component of Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to execute ar…EPSS 6.8%9.0CVE-2014-0649Cisco secure access control system permissions and access controls vulnerabilityThe RMI interface in Cisco Secure Access Control System (ACS) 5.x before 5.5 does not properly enforce authorization requirements, which allows remot…EPSS 2.6%7.5CVE-2017-3841Cisco secure access control system information exposure vulnerabilityA vulnerability in the web interface of the Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to disclose sens…EPSS 2.4%6.8CVE-2013-3424Cisco secure access control system cross-site request forgery vulnerabilityCross-site request forgery (CSRF) vulnerability in Administration and View pages in Cisco Secure Access Control System (ACS) allows remote attackers …EPSS 1.2%6.8CVE-2013-1200Cisco secure access control system improper authentication vulnerabilitySession fixation vulnerability in Cisco Secure Access Control System (ACS) allows remote attackers to hijack web sessions via unspecified vectors, ak…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2013-5536), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.