Coverage › CVE-2020-3566
CVE-2020-3566 Unmapped
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
- Vendor / product
- Cisco — IOS XR
- Description (CISA)
- 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.
- Added to KEV
- 2021-11-03
- Due date
- 2022-05-03
- Required action
- Apply updates per vendor instructions.
- Known ransomware use
- Unknown
- CWE
- CWE-400
- CISA notes
- https://nvd.nist.gov/vuln/detail/CVE-2020-3566
- Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2020-3566. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-400) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.