{"schema_version":"1","data":[{"id":245,"advisory_id":"e2984e2e-19aa-4cae-a3df-e9342edf9155","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-21510","source_published_at":"2026-02-10T00:00:00+00:00","published_at":"2026-10-24T20:42:41.257704+00:00","extraction_method":"structured","technologies":["core-kev","windows"],"cve_ids":["CVE-2026-21510"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Microsoft Windows Shell Protection Mechanism Failure Vulnerability","summary":"Microsoft Windows Shell contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network. CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","evidence":"kev:CVE-2026-21510","products":[{"name":{"value":"Windows","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2026-21510","aliases":["CVE-2026-21510"],"affected":[],"modified":"2026-02-10T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-693"],"cveID":"CVE-2026-21510","notes":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21510 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21510 ","dueDate":"2026-03-03","product":"Windows","dateAdded":"2026-02-10","vendorProject":"Microsoft","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_exploited":true,"shortDescription":"Microsoft Windows Shell contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network. ","vulnerabilityName":"Microsoft Windows Shell Protection Mechanism Failure Vulnerability","knownRansomwareCampaignUse":"Unknown"}},"related_cves":[{"value":"CVE-2026-21510","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null}}],"next_after":245,"next_before":245}