Cisco Identity Services Engine contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
To exploit this vulnerability, an attacker would likely need access to trusted, internal networks and access to the guest account creation page from the targeted device to create new guest accounts. These access requirements limit the likelihood of a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
Cisco released a security notice at the following link: CVE-2013-5521
Customers are advised to consult Cisco bug ID CSCue94287 or the most complete list of affected product versions.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.