CVE-2016-9249: F5 Networks F5 BIG-IP LTM, AAM, AFM, Analytics,…

CVE-2016-9249: An undisclosed traffic pattern received by a BIG-IP Virtual Server with TCP Fast Open enabled may cause the...

An undisclosed traffic pattern received by a BIG-IP Virtual Server with TCP Fast Open enabled may cause the Traffic Management Microkernel (TMM) to restart, resulting in a Denial-of-Service (DoS).

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 02:42 UTC (UTC+00:00)

Security readout for executives and security teams

A specific, undisclosed traffic pattern can make affected F5 BIG-IP virtual servers restart their traffic-processing component when TCP Fast Open is enabled. That can interrupt applications behind the load balancer, causing denial of service rather than data theft. Business impact depends on whether exposed BIG-IP services run affected versions and use this feature. Exposure is most likely where BIG-IP 12.0.0-12.1.1 virtual servers are reachable by untrusted clients and have TCP Fast Open enabled. LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, and WebSafe are listed as affected products. Handle as a targeted availability issue for internet-facing F5 BIG-IP deployments. Prioritize systems on affected versions with TCP Fast Open enabled, especially where BIG-IP fronts revenue, identity, DNS, or customer-facing services. Urgency is meaningful but evidence does not support calling this actively exploited or critical from the provided sources. Mitigation focus: Inventory BIG-IP systems and identify versions 12.0.0 through 12.1.1.; Check F5 advisory K71282001 for vendor-approved fixes or workarounds.; Identify virtual servers with TCP Fast Open enabled..

Prepared: Jun 13, 2026, 06:20 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: Jan 31, 2017, 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

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://support.f5.com/csp/article/K71282001CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

F5 NetworksF5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, WebSafe12.0.0-12.1.1Listed

Weakness

CWE details

No CWE listed

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