CVE Explorer
CVE-2026-20084
A vulnerability in the DHCP snooping feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause BOOTP packets to be forwarded between VLANs, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper handling of BOOTP packets on Cisco Catalyst 9000 Series Switches. An attacker could exploit this vulnerability by sending BOOTP request packets to an affected device. A successful exploit could allow an attacker to forward BOOTP packets
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"Cisco IOS XE Software","vendor":"Cisco","versions":[{"status":"affected","version":"16.6.1"},{"status":"affected","version":"16.6.2"},{"status":"affected","version":"16.6.3"},{"status":"affected","version":"16.6.4"},{"status":"affected","version":"16.6.5"},{"status":"affected","version":"16.6.4a"},{"status":"affected","version":"16.6.6"},{"status":"affected","version":"16.6.7"},{"status":"affected","version":"16.6.8"},{"status":"affected","version":"16.6.9"},{"status":"affected","version":"16.6.10"},{"status":"affected","version":"16.7.1"},{"status":"affected","version":"16.8.1"},{…
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:0e0d44ededba108546f34f1223da96577e3961b6ac7515b5c8d06e20711e5998 · sha256:6fd296c478cb55ef… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/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:v2:0e0d44ededba108546f34f1223da96577e3961b6ac7515b5c8d06e20711e5998 · sha256:6fd296c478cb55ef… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-400","description":"Uncontrolled Resource Consumption","lang":"en","type":"cwe"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:0e0d44ededba108546f34f1223da96577e3961b6ac7515b5c8d06e20711e5998 · sha256:6fd296c478cb55ef… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"cisco-sa-bootp-WuBhNBxA","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bootp-WuBhNBxA"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:0e0d44ededba108546f34f1223da96577e3961b6ac7515b5c8d06e20711e5998 · sha256:6fd296c478cb55ef… · /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.