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critical·Network Vulnerabilities·Updated Jul 20, 2025

VMware ESXi SLP - Heap Overflow DoS

Est. Time~10 seconds
Scan TypeSingle Scan
Targetsdomain, subdomain, ipv4
CostFree
2.5k
Times Used
continuous scan runs
0
Continuously Checked
assets under CS
0
Vulnerabilities Found
confirmed findings
References
🔴
CISA Known Exploited Vulnerability
This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.
CVECVE-2019-5544
9.8
CVSScritical
Exploitable remotely over the internet · no authentication required.

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.

Attack Vector
Network
Privileges Req.
None
User Interaction
None
Affected
ESXi and Horizon DaaSby n/a
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.
Updated Sep 9, 2026View on NVD →

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VMware ESXi SLP - Heap Overflow DoS CVE-2019-5544 Scanner | S4E