{"schema_version":"1","data":[{"id":3750,"advisory_id":"3e78aef0-593e-4ee9-a5ab-14d484c6863a","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-27561","source_published_at":"2021-11-03T00:00:00+00:00","published_at":"2026-10-24T21:40:20.239082+00:00","extraction_method":"structured","technologies":["core-kev","device-management"],"cve_ids":["CVE-2021-27561"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Yealink Device Management Server-Side Request Forgery (SSRF) Vulnerability","summary":"Yealink Device Management contains a server-side request forgery (SSRF) vulnerability that allows for unauthenticated remote code execution. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2021-27561","products":[{"name":{"value":"Device Management","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-27561","aliases":["CVE-2021-27561"],"affected":[],"modified":"2021-11-03T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-78"],"cveID":"CVE-2021-27561","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-27561","dueDate":"2021-11-17","product":"Device Management","dateAdded":"2021-11-03","vendorProject":"Yealink","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"Yealink Device Management contains a server-side request forgery (SSRF) vulnerability that allows for unauthenticated remote code execution.","vulnerabilityName":"Yealink Device Management Server-Side Request Forgery (SSRF) Vulnerability","knownRansomwareCampaignUse":"Unknown"}},"related_cves":[{"value":"CVE-2021-27561","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null}}],"next_after":3750,"next_before":3750}