CVE Explorer
CVE-2026-20051
A vulnerability with the Ethernet VPN (EVPN) Layer 2 ingress packet processing of Cisco Nexus 3600 Platform Switches and Cisco Nexus 9500-R Series Switching Platforms could allow an unauthenticated, adjacent attacker to trigger a Layer 2 traffic loop.
This vulnerability is due to a logic error when processing a crafted Layer 2 ingress frame. An attacker could exploit this vulnerability by sending a stream of crafted Ethernet frames through the targeted device. A successful exploit could allow
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unknown","product":"Cisco NX-OS Software","vendor":"Cisco","versions":[{"status":"affected","version":"9.2(3)"},{"status":"affected","version":"9.2(2v)"},{"status":"affected","version":"9.2(1)"},{"status":"affected","version":"9.2(2t)"},{"status":"affected","version":"9.2(3y)"},{"status":"affected","version":"9.3(2)"},{"status":"affected","version":"9.2(4)"},{"status":"affected","version":"9.3(1)"},{"status":"affected","version":"9.3(1z)"},{"status":"affected","version":"9.2(2)"},{"status":"affected","version":"9.3(3)"},{"status":"affected","version":"9.3(4)"},{"status":"affe…
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:f090cf285399506bf268943abd61ed435c3b81ada0387a9bd77a6bd0d7f7a59b · sha256:ca271d8ea34caba4… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:f090cf285399506bf268943abd61ed435c3b81ada0387a9bd77a6bd0d7f7a59b · sha256:ca271d8ea34caba4… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-457","description":"Use of Uninitialized Variable","lang":"en","type":"cwe"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:f090cf285399506bf268943abd61ed435c3b81ada0387a9bd77a6bd0d7f7a59b · sha256:ca271d8ea34caba4… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"cisco-sa-nxos-ether-dos-Kv8YNWZ4","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ether-dos-Kv8YNWZ4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f090cf285399506bf268943abd61ed435c3b81ada0387a9bd77a6bd0d7f7a59b · sha256:ca271d8ea34caba4… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.