ACTIVELY EXPLOITED
CVE-2019-5544: VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability
| Vendor | VMware |
|---|---|
| Product | VMware ESXi and Horizon DaaS |
| Actively exploited | Yes |
| Added to CISA KEV | 3 Nov 2021 |
| CISA federal deadline | 3 May 2022 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-787 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
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.
SOURCES
Other VMware flaws
- CVE-2025-22226: VMware ESXi, Workstation, and Fusion Information Disclosure Vulnerability
- CVE-2025-22225: VMware ESXi Arbitrary Write Vulnerability
- CVE-2025-22224: VMware ESXi and Workstation TOCTOU Race Condition Vulnerability
- CVE-2024-38813: VMware vCenter Server Privilege Escalation Vulnerability
- CVE-2024-38812: VMware vCenter Server Heap-Based Buffer Overflow Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.