CVE-2013-5559: n/a vulnerability

CVE-2013-5559: Buffer overflow in the Active Template Library (ATL) framework in the VPNAPI COM module in Cisco AnyConnect...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 17:15 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2013-5559 is a user-assisted remote code execution issue in Cisco AnyConnect Secure Mobility Client 2.x. A vulnerable endpoint could be compromised if a user opens crafted HTML content. The source bundle does not provide CVSS, affected platform detail, fixed version detail, or evidence of active exploitation. Exposure is most likely on endpoints still running Cisco AnyConnect Secure Mobility Client 2.x with the VPNAPI COM module. The provided data does not identify other affected products, exact platforms, or fixed releases. Treat this as a high-priority legacy endpoint risk if AnyConnect 2.x remains in the environment. The strongest business driver is possible code execution on user workstations, but urgency depends on whether the legacy client is still deployed. Mitigation focus: Inventory endpoints for Cisco AnyConnect Secure Mobility Client 2.x.; Review Cisco’s security notice for supported remediation guidance.; Upgrade, remove, or replace affected legacy clients per vendor guidance..

Prepared: Jun 14, 2026, 15:13 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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CVE-2013-5559 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 4, 2013, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

1Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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