{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T10:12:14Z","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","advisory":{"id":"cisco-sa-cbw-dos-YSmbUqX3","slug":"cisco-sa-cbw-dos-ysmbuqx3","vendor":"Cisco","title":"Cisco Wireless LAN Controller AireOS Software Denial of Service Vulnerability","summary":"A vulnerability in the memory buffer of Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause memory leaks that could eventually lead to a device reboot. This vulnerability is due to memory leaks caused by multiple clients connecting under specific conditions. An attacker could exploit this vulnerability by causing multiple wireless clients to attempt to connect to an access point (AP) on an affected device. A successful exploit could allow the attacker to cause the affected device to reboot after a significant amount of time, resulting in a denial of service (DoS) condition. Cisco has released software updates that address this vulnerability. There is a workaround that addresses this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3","severity":"Medium","published_at":"2023-09-27T16:00:00Z","updated_at":"2023-09-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3/csaf/cisco-sa-cbw-dos-YSmbUqX3.json","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure."},"freshness":{"last_source_refreshed_at":"2026-07-21T05:16:34Z","latest_source_refresh_at":"2026-07-21T05:16:34Z","oldest_source_refresh_at":"2026-07-21T03:00:03Z","all_sources_fresh":true,"sources":[{"source":"cisco_advisories","label":"Cisco advisories","last_success_at":"2026-07-21T03:00:03Z","stale":false},{"source":"cisco_csaf","label":"Cisco CSAF","last_success_at":"2026-07-21T05:14:24Z","stale":false},{"source":"nvd_cves","label":"NVD CVEs","last_success_at":"2026-07-21T05:16:30Z","stale":false},{"source":"cisa_kev","label":"CISA KEV","last_success_at":"2026-07-21T05:16:31Z","stale":false},{"source":"first_epss","label":"EPSS","last_success_at":"2026-07-21T05:16:34Z","stale":false}]},"summary":{"cve_count":1,"visible_product_count":2,"public_evidence_count":2,"kev_count":0,"highest_epss":0.00231},"cves":[{"id":"CVE-2023-20251","kev":false,"epss":{"score":0.00231,"percentile":0.14014,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"}}],"public_evidence":[{"product":{"name":"Cisco Mobility Express","slug":"cisco-mobility-express","vendor":"Cisco"},"cve":{"id":"CVE-2023-20251"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:09:30Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Mobility Express","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00231,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2023-09-27T16:00:00Z","updated_at":"2023-09-27T16:00:00Z","advisory_updated_at":"2023-09-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3"},"row_display_order":1},{"product":{"name":"Cisco Virtual Wireless Controller","slug":"cisco-virtual-wireless-controller","vendor":"Cisco"},"cve":{"id":"CVE-2023-20251"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:09:30Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Wireless LAN Controller (WLC) 8.10.151.0 when installed on Cisco Virtual Wireless Controller; Cisco Wireless LAN Controller (WLC) 8.10.162.0 when installed on Cisco Virtual Wireless Controller; Cisco Wireless LAN Controller (WLC) 8.10.170.0 when installed on Cisco Virtual Wireless Controller; Cisco Wireless LAN Controller (WLC) 8.10.171.0 when installed on Cisco Virtual Wireless Controller; Cisco Wireless LAN Controller (WLC) 8.10.181.0 when installed on Cisco Virtual Wireless Controller; Cisco Wireless LAN Controller (WLC) 8.10.182.0 when installed on Cisco Virtual Wireless Controller; Cisco Wireless LAN Controller (WLC) 8.10.183.0 when installed on Cisco Virtual Wireless Controller; Cisco Wireless LAN Controller (WLC) 8.10.185.0 when installed on Cisco Virtual Wireless Controller","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00231,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2023-09-27T16:00:00Z","updated_at":"2023-09-27T16:00:00Z","advisory_updated_at":"2023-09-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbw-dos-YSmbUqX3"},"row_display_order":2}]}