Live › vulnerability › CVE-2020-3569
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 memory until it crashes. CISA lists it as actively exploited.
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 per Cisco's vendor instructions; the specific fixed release is unknown from the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Multiple vulnerabilities in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to either immediately crash the Internet Group Management Protocol (IGMP) process or make it consume available memory and eventually crash. The memory consumption may negatively impact other processes that are running on the device. These vulnerabilities are due to the incorrect handling of IGMP packets. An attacker could exploit these vulnerabilities by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to immediately crash the IGMP process or cause memory exhaustion, resulting in other processes becoming unstable. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address these vulnerabilities.
This page as .md · .json · in your agent: get_signal("CVE-2020-3569")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.