How severe is CVE-2013-5559?

CVE-2013-5559 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2013-5559 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-5559?

CVE-2013-5559 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 43 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-5559?

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

When was CVE-2013-5559 published?

CVE-2013-5559 was published on 2013-11-04 and last updated on 2026-06-16.

CVE-2013-5559

CVE-2013-5559 is a medium-severity vulnerability in Cisco Anyconnect Secure Mobility Client with a CVSS 2.0 base score of 6.8. 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-119.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Anyconnect Secure Mobility Client
Published: 2013-11-04
Last modified: 2026-06-16

Description

Buffer overflow in the Active Template Library (ATL) framework in the VPNAPI COM module in Cisco AnyConnect Secure Mobility Client 2.x allows user-assisted remote attackers to execute arbitrary code via a crafted HTML document, aka Bug ID CSCuj58139.

Frequently asked questions

What is CVE-2013-5559?: Buffer overflow in the Active Template Library (ATL) framework in the VPNAPI COM module in Cisco AnyConnect Secure Mobility Client 2.x allows user-assisted remote attackers to execute arbitrary code via a crafted HTML document, aka Bug ID CSCuj58139.
How severe is CVE-2013-5559?: CVE-2013-5559 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2013-5559 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-5559?: CVE-2013-5559 primarily affects Cisco Anyconnect Secure Mobility Client. In total, 43 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-5559?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-5559 published?: CVE-2013-5559 was published on 2013-11-04 and last updated on 2026-06-16.

References

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5559

Affected products (43)

cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.128:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.133:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.136:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.2.140:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.185:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.254:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.3.2016:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4:*:*:*:*:symbian_os:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.0202:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.1012:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.4004:*:*:*:*:iphone_os:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.4014:*:*:*:*:iphone_os:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.5004:*:*:*:*:symbian_os:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.7030:*:*:*:*:android:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.4.7073:*:*:*:*:android:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.0217:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.1025:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2001:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2006:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2010:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2011:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2014:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2017:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2018:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.2019:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3041:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3046:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3051:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3054:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.3055:*:*:*:*:*:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.5112:*:*:*:*:iphone_os:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.5116:*:*:*:*:android:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.5118:*:*:*:*:android:*:*
cpe:2.3:a:cisco:anyconnect_secure_mobility_client:2.5.5125:*:*:*:*:android:*:*

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