{"schema":"threatline.record/2","record":{"id":"CVE-2019-5544","aliases":[],"summary":"VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability","details":"VMware ESXi and Horizon Desktop as a Service (DaaS) OpenSLP contains a heap-based buffer overflow vulnerability that allows an attacker with network access to port 427 to overwrite the heap of the OpenSLP service to perform remote code execution.","categories":["Containers & cloud"],"product":"VMware ESXi and Horizon DaaS","vendor":"VMware","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2019-5544","source_modified_at":"2025-10-21T23:35:56.590Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"ESXi and Horizon DaaS","vendor":"n/a","versions":[{"status":"affected","version":"ESXi 6.7 prior to patch release ESXi670-201912001, ESXi 6.5 prior to patch release ESXi650-201912001, ESXi 6.0 prior to patch release ESXi600-201912001 and Horizon DaaS 8.x prior to BZ-2467224-Disable_SLPD_service_permanently_801_Hotfix."}],"defaultStatus":null}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2021-11-03","due_date":"2022-05-03","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Known"},"epss":{"probability":0.98129,"percentile":0.99914,"score_date":"2026-10-23"},"published_at":"2019-12-06T15:54:18.000Z","modified_at":"2025-10-21T23:35:56.590Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2019-5544","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:35:56.590Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/network/cves/2019/CVE-2019-5544.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-5544","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-5544","source":"CISA KEV"},{"source":"CVE List","url":"https://access.redhat.com/errata/RHSA-2019:4240","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"source":"CVE List","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZPXXJZLPLAQULBCJVI5NNWZ3PGWXGXWG/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"source":"CVE List","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DA3LYAJ2NRKMOZLZOQNDJ5TNQRFMWGHF/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"source":"CVE List","url":"https://access.redhat.com/errata/RHSA-2020:0199","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"source":"CVE List","url":"https://security.gentoo.org/glsa/202005-12","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5544","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2025-02-07T13:13:22.588499Z"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"VMware ESXi SLP - Heap Overflow DoS","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/network/cves/2019/CVE-2019-5544.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:35:56.590Z","content_hash":"274d0b30a6f99b25a00fe9e1e3b2d26e3a42955f4dd15d3c1011543cef39ce68"}}