Skip to main content

Actively exploited

Listed in CISA’s Known Exploited Vulnerabilities catalog since November 3, 2021.

Known ransomware use

CVE-2019-5544

VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability

VMware · VMware ESXi and Horizon DaaS

Added to KEV November 3, 2021

Alert details

Source feed
CISA KEV
CVE ID
CVE-2019-5544
CWE
CWE-787
Affected products
VMware ESXi and Horizon DaaS · VMware VMware ESXi and Horizon DaaS · VMware

What happened

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.

What it means for your business

VMware VMware ESXi and Horizon DaaS is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2019-5544). 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. CISA remediation due date: 2022-05-03. If you need help checking exposure, call (864) 335-9223.

Required action

Apply updates per vendor instructions.

CISA due date: May 3, 2022

Sources

Related briefs

Industry news

North Korean IT Workers Expanding Use of Facilitators, Broadening Recruitment

North Korean IT Workers Expanding Use of Facilitators, Broadening Recruitment — FBI IC3 industry advisory relevant to cyber risk. PremierePC monitors federal alerts for Upstate SC businesses. Read the source link for full guidance or open a ticket if you want help assessing impact.

  • Vendor:FBI IC3
Microsoft MSRC

CVE-2026-97830

Windows Internet Information Services Denial of Service vulnerability

Windows Internet Information Services Denial of Service vulnerability (CVE-2026-97830) was added to Microsoft’s security update guidance. <p>Double free in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.</p> If you need help checking exposure, call (864) 335-9223.

Microsoft MSRC

CVE-2026-97816

Microsoft OpenSSH for Windows Remote Code Execution vulnerability

Microsoft OpenSSH for Windows Remote Code Execution vulnerability (CVE-2026-97816) was added to Microsoft’s security update guidance. <p>Use after free in OpenSSH for Windows allows an unauthorized attacker to execute code over a network.</p> If you need help checking exposure, call (864) 335-9223.

Microsoft MSRC

CVE-2026-97815

Windows Error Reporting Remote Code Execution vulnerability

Windows Error Reporting Remote Code Execution vulnerability (CVE-2026-97815) was added to Microsoft’s security update guidance. <p>Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.</p> If you need help checking exposure, call (864) 335-9223.

Need help patching?

PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.