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CVE-2020-3569: Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
Cisco IOS XR · in CISA KEV since 2021-11-03
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2021-11-03added to KEV
2022-05-03federal remediation due date
3.32%EPSS exploit probability (30 days) 88.2th percentile
8.6 HIGHCVSS 3.1
Unknownknown ransomware use
406days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-400 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVD published | 2020-09-23 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2020-3569.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.