HIGHCVSS v3.1 8.6Actively exploited · CISA KEV since 2021-11-03Vulnerability

CVE-2020-3569

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.

Properties

Euvd product
Cisco IOS XR Software
Vulnerability name
Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
First seen
2025-10-21T23:35:36+00:00
Cvss score
8.6
Epss score
0.0332
Last seen
2026-10-19T12:00:27+00:00
Due date
2022-05-03
Euvd assigner
cisco
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2021-11-03T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2021-11-03
Score
8.6
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Cisco
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
8.6

Related Entities (60 · showing 24)

AFFECTS_PRODUCT (56 · showing 20)

→[Product]cpe:2.3:h:cisco:crs:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-1_4-slot_single-shelf_system:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-3_4-slot_single-shelf_system:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-3_16-slot_single-shelf_system:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-1_8-slot_single-shelf_system:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-3_8-slot_single-shelf_system:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-1_16-slot_line_card_chassis:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:6.4.3:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-1_8-slot_line_card_chassis:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-1_multishelf_system:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-1_fabric_card_chassis:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-1_16-slot_single-shelf_system:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-8\/scrs:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:6.3.3:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:6.4.2:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:6.2.3:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:6.1.4:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:7.1.15:*:*:*:*:*:*:*

HAS_WEAKNESS (2)

→[Weakness]Uncontrolled Resource Consumption
→[Weakness]Allocation of Resources Without Limits or Throttling

DESCRIBES (1)

←[KEVEntry]Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability

INVOLVES (1)

←[Signal]kev_added · 2021-11-03

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CVE-2020-3569 (CVSS v3.1 8.6) — Ninja Signal Threat Intelligence | Ninja Signal