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VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.","status":"published","published":"2019-12-06T15:54:18Z","modified":"2025-10-21T23:35:56Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"exploited_since":"2021-11-03","updated_at":"2026-11-02T20:31:24.816637Z"}],"ghsa":[{"id":"GHSA-4734-5452-r5fh","title":"OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has...","description":"OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.","status":"published","published":"2022-05-24T17:02:49Z","modified":"2025-10-22T00:31:50Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:04:04.176931Z"}],"kev":[{"id":"CVE-2019-5544","title":"VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability","description":"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.","cwes":["CWE-787"],"kev":{"date_added":"2021-11-03","due_date":"2022-05-03","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:17.050017Z"}],"nvd":[{"id":"CVE-2019-5544","description":"OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.","status":"published","published":"2019-12-06T16:15:11.467Z","modified":"2026-06-17T02:37:52.78Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:05:38.993437Z"}],"osv":[{"id":"AZL-36968","title":"CVE-2019-5544 affecting package openslp for versions less than 2.0.0-26","description":"OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.","status":"published","published":"2019-12-06T16:15:11Z","modified":"2026-11-05T05:36:30Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-05T16:41:19.554273Z"},{"id":"AZL-7321","title":"CVE-2019-5544 affecting package openslp for versions less than 2.0.0-26","description":"OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.","status":"published","published":"2019-12-06T16:15:11Z","modified":"2026-04-21T04:33:50.565926Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:09.201912Z"},{"id":"RHSA-2019:4240","title":"Red Hat Security Advisory: openslp security update","status":"published","published":"2024-09-16T03:24:27Z","modified":"2026-06-26T12:22:04.388714572Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"RHSA-2020:0199","title":"Red Hat Security Advisory: openslp security update","status":"published","published":"2024-09-16T03:24:34Z","modified":"2026-06-26T10:45:53Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"UBUNTU-CVE-2019-5544","description":"OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.","status":"published","published":"2019-12-06T05:00:00Z","modified":"2026-04-22T11:58:23.245135Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:21.741399Z"},{"id":"DLA-2025-1","title":"openslp-dfsg - security update","status":"published","published":"2019-12-08T00:00:00Z","modified":"2026-03-09T01:22:20.753017Z","updated_at":"2026-11-02T15:46:10.227108Z"},{"id":"MGASA-2020-0075","title":"Updated openslp packages fix security vulnerability","description":"A heap-based buffer overflow was discovered in OpenSLP in the way the slpd\nservice processes URLs in service request messages. A remote unauthenticated\nattacker could register a service with a specially crafted URL that, when\nused during a service request message, would trigger the flaw and cause the\nprogram to crash or to remotely execute code with the privileges of the slpd\nservice (CVE-2019-5544).\n","status":"published","published":"2020-02-09T19:13:40Z","modified":"2026-04-16T04:42:15.861465571Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"USN-4919-1","title":"openslp-dfsg vulnerability","description":"It was discovered that OpenSLP did not properly validate URLs. A remote\nattacker could use this issue to cause OpenSLP to crash or possibly execute\narbitrary code.\n","status":"published","published":"2021-04-19T19:28:33Z","modified":"2026-06-29T13:48:52.589487808Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}