CVE-2019-5544: VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability
Description
CVE-2019-5544 is a heap-based buffer overflow vulnerability in the OpenSLP service of VMware ESXi and Horizon Desktop as a Service (DaaS). It allows an attacker with network access to port 427 to overwrite the heap memory of the OpenSLP service, potentially enabling remote code execution. This vulnerability has been exploited in the wild and is associated with known ransomware campaigns. No specific affected versions or patch information are provided in the available data.
Weaknesses
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Technical Analysis
The vulnerability CVE-2019-5544 affects VMware ESXi and Horizon DaaS OpenSLP service. It is a heap-based buffer overflow (CWE-787) that can be triggered remotely by an attacker with network access to port 427. Exploitation can lead to remote code execution by overwriting the heap memory of the OpenSLP service. The vulnerability has been observed in active exploitation scenarios, including ransomware campaigns. No vendor advisory or patch information is included in the provided data.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code on affected VMware ESXi and Horizon DaaS systems by exploiting a heap-based buffer overflow in the OpenSLP service. This can lead to full system compromise, disruption of services, and has been linked to ransomware attacks in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict network access to port 427 to trusted sources only to reduce exposure to this vulnerability.
Threat ID: 6adc6f613fe894698b2dda6c
Added to database: 10/24/2026, 08:42:09 UTC
Last enriched: 10/24/2026, 08:43:03 UTC
Last updated: 10/24/2026, 09:30:24 UTC
Views: 3
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