CVE Explorer
CVE-2026-20074
A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) multi-instance routing feature of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the IS-IS process to restart unexpectedly.
This vulnerability is due to insufficient input validation of ingress IS-IS packets. An attacker could exploit this vulnerability by sending crafted IS-IS packets to an affected device after forming an adjacency. A successful exploit could allow the attacker to cau
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unknown","product":"Cisco IOS XR Software","vendor":"Cisco","versions":[{"status":"affected","version":"7.8.1"},{"status":"affected","version":"7.9.1"},{"status":"affected","version":"7.10.1"},{"status":"affected","version":"7.8.2"},{"status":"affected","version":"7.8.22"},{"status":"affected","version":"7.9.2"},{"status":"affected","version":"7.11.1"},{"status":"affected","version":"7.9.21"},{"status":"affected","version":"7.10.2"},{"status":"affected","version":"24.1.1"},{"status":"affected","version":"7.11.2"},{"status":"affected","version":"24.2.1"},{"status":"affected","…
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:cc37470538b5598dffbcaa99536ebc7ee591c274f4ac2af74bf3a7977510058d · sha256:b24c9f32a51ca535… · /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:cc37470538b5598dffbcaa99536ebc7ee591c274f4ac2af74bf3a7977510058d · sha256:b24c9f32a51ca535… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-1287","description":"Improper Validation of Specified Type of Input","lang":"en","type":"cwe"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:cc37470538b5598dffbcaa99536ebc7ee591c274f4ac2af74bf3a7977510058d · sha256:b24c9f32a51ca535… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"cisco-sa-isis-dos-kDMxpSzK","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-isis-dos-kDMxpSzK"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:cc37470538b5598dffbcaa99536ebc7ee591c274f4ac2af74bf3a7977510058d · sha256:b24c9f32a51ca535… · /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.