Is CVE-2020-3569 actively exploited?

Yes. CVE-2020-3569 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2020-3569 be exploited remotely?

The attack vector of CVE-2020-3569 has not been classified yet.

What is the CVSS score of CVE-2020-3569?

CVE-2020-3569 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2020-3569

HIGHCISA KEVIN THE WILD

CVE-2020-3569

Published: November 3, 2021

EPSS:5.55%probability of exploitation in 30 daysPercentile:90.1th

Official Description

Cisco IOS XR Distance Vector Multicast Routing Protocol (DVMRP) incorrectly handles Internet Group Management Protocol (IGMP) packets. Exploitation could allow an unauthenticated, remote attacker to immediately crash the IGMP process or make it consume available memory and eventually crash.

NVD Source

CISA KEV Advisory

Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Cisco IOS XR's DVMRP incorrectly handles IGMP packets, allowing an unauthenticated, remote attacker to crash the IGMP process or consume memory leading to a system crash. The high EPSS score of 0.05554 indicates a significant likelihood of exploitation, and its inclusion in CISA's KEV confirms it has been actively exploited.

Active exploitation of this vulnerability has been observed in the wild. The vulnerability is remotely exploitable by an unauthenticated attacker.

Recommended Action

Administrators should apply the latest security updates for Cisco IOS XR to address this vulnerability. Review and harden IGMP configurations to minimize exposure.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2020-3569 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2020-3569 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.