By Linda Leung

Cisco is warning that a flaw in its Firewall Services Module could result in a reload of the module, or if exploited repeatedly, could result in a sustained denial-of-service attack.

FWSM is an integrated firewall module for Cisco Catalyst 6500 switches and Cisco 7600 Series routers.

In its security alert issued Wednesday, Cisco says there are "no known instances of intentional exploitation of this issue," but that it has "observed data streams that appear to be unintentionally triggering this vulnerability."

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