CVE-2011-4016: n/a vulnerability

CVE-2011-4016: The PPP implementation in Cisco IOS 12.2 and 15.0 through 15.2, when Point-to-Point Termination and Aggrega...

The PPP implementation in Cisco IOS 12.2 and 15.0 through 15.2, when Point-to-Point Termination and Aggregation (PTA) and L2TP are used, allows remote attackers to cause a denial of service (device crash) via crafted network traffic, aka Bug ID CSCtf71673.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 23:53 UTC (UTC+00:00)

Security readout for executives and security teams

This is a Cisco IOS availability flaw. Certain routers using PPP Point-to-Point Termination and Aggregation with L2TP can crash when they receive crafted network traffic. The business risk is network disruption, especially on legacy aggregation or access infrastructure. Exposure appears limited to Cisco IOS devices in the listed release trains that are configured for both PTA and L2TP. Environments without those features, or without affected Cisco IOS versions, are less likely to be exposed based on the provided evidence. Handle as a legacy network availability risk. It is not described as data theft or remote code execution, but a router crash can still interrupt customer, branch, or partner connectivity. Mitigation focus: Inventory Cisco IOS 12.2 and 15.0 through 15.2 devices.; Identify devices using both PTA and L2TP.; Review Cisco guidance for Bug ID CSCtf71673..

Prepared: Jun 24, 2026, 12:52 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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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 2, 2012, 10:00 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

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

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