CVE-2020-3566

Known Exploited Vulnerability Entry External Catalog

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Entry Details

CVE-2020-3566

Confirmed

Yes

2021-11-03 00:00 UTC

Timestamps

2021-11-03

2021-11-03

Scope

KEV entry: Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability | Affected: Cisco / IOS XR | 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. | Required action: Apply updates per vendor instructions. | Due date: 2022-05-03 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2020-3566

References
  • {'id': 'CVE-2020-3566', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-3566'}

a67d95c0-0417-43ed-bda3-adc894a1e3e5

405284c2-e461-4670-8979-7fd2c9755a60

2026-02-02 13:26 UTC

2026-02-06 07:53 UTC

Evidence (1)
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-400"
  ],
  "date_added": "2021-11-03",
  "due_date": "2022-05-03",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "IOS XR",
  "vendorProject": "Cisco",
  "vulnerabilityName": "Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability"
}
 -
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