How severe is CVE-2013-5521?

CVE-2013-5521 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2013-5521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-5521?

CVE-2013-5521 affects Cisco Identity Services Engine Software. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-5521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-5521 published?

CVE-2013-5521 was published on 2013-10-25 and last updated on 2026-06-16.

CVE-2013-5521

CVE-2013-5521 is a medium-severity vulnerability in Cisco Identity Services Engine Software with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Cisco Identity Services Engine Software
Published: 2013-10-25
Last modified: 2026-06-16

Description

Cisco Identity Services Engine does not properly restrict the creation of guest accounts, which allows remote attackers to cause a denial of service (exhaustion of the account supply) via a series of requests within one session, aka Bug ID CSCue94287.

Frequently asked questions

What is CVE-2013-5521?: Cisco Identity Services Engine does not properly restrict the creation of guest accounts, which allows remote attackers to cause a denial of service (exhaustion of the account supply) via a series of requests within one session, aka Bug ID CSCue94287.
How severe is CVE-2013-5521?: CVE-2013-5521 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2013-5521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-5521?: CVE-2013-5521 affects Cisco Identity Services Engine Software. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-5521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-5521 published?: CVE-2013-5521 was published on 2013-10-25 and last updated on 2026-06-16.

References

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5521

Affected products (1)

cpe:2.3:a:cisco:identity_services_engine_software:-:*:*:*:*:*:*:*

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