Live › vulnerability › CVE-2020-3566
Go to dashboardCisco IOS XR routers mishandle IGMP packets when DVMRP is in use, so an unauthenticated remote attacker can crash the IGMP process or exhaust its memory until it crashes. CISA lists it as actively exploited in the wild.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Cisco IOS XR | vendor | – | – |
Unknown from the sources. In the analyst’s queue.
Apply the updates from Cisco's advisory per vendor instructions (CISA requires this; the fixed version is unknown from the sources).
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability.
This page as .md · .json · in your agent: get_signal("CVE-2020-3566")
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