Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2019-5544

CVE-2019-5544CRITICAL

n/a ESXi and Horizon DaaS — VMware VMware ESXi and Horizon DaaS

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .9726   99.9   YES

AFFECTED
  Product                Versions                                                                                                                                                                                                                                         Fixed
  ESXi and Horizon DaaS  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. –  —

TIMELINE
  Jan 7   Reserved by vmware
  Dec 6   Published (CNA: vmware)
  Nov 3   Added to CISA KEV, remediation due 2022-05-03

CWE-787 · CNA: vmware · CVSS v3.1 · 9 references · KEV due May 3, 2022

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
January 7, 2019	Reserved	Reserved by vmware
December 6, 2019	Published	Published (CNA: vmware)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2022-05-03

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	ESXi and Horizon DaaS	—	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.	—

Weaknesses

CWE-787

References (9)

http://www.openwall.com/lists/oss-security/2019/12/10/2 [mailing-list, x_refsource_MLIST]
http://www.openwall.com/lists/oss-security/2019/12/11/2 [mailing-list, x_refsource_MLIST]
http://www.vmware.com/security/advisories/VMSA-2019-0022.html [x_refsource_CONFIRM]
https://access.redhat.com/errata/RHSA-2019:4240 [vendor-advisory, x_refsource_REDHAT]
https://access.redhat.com/errata/RHSA-2020:0199 [vendor-advisory, x_refsource_REDHAT]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DA3LYAJ2NRKMOZLZOQNDJ5TNQRFMWGHF/ [vendor-advisory, x_refsource_FEDORA]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZPXXJZLPLAQULBCJVI5NNWZ3PGWXGXWG/ [vendor-advisory, x_refsource_FEDORA]
https://security.gentoo.org/glsa/202005-12 [vendor-advisory, x_refsource_GENTOO]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5544 [government-resource]

Authoritative record: CVE-2019-5544 at cve.org

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-5544 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.