CVE-2019-5544

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.

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

97.26% chance of exploitation in the next 30 days, 100th percentile

CISA KEV

added 2021-11-03, used in ransomware campaigns

Nuclei

critical · CWE-787

Published

2019-12-06

Updated

2025-10-21

Proof-of-concept exploits (1)

• HynekPetrak/CVE-2019-5544_CVE-2020-399250★ · 2023-02-07

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/network/cves/2019/CVE-2019-5544.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2020-3992
• CVE-2019-5526
• CVE-2019-5591
• CVE-2019-5512
• CVE-2019-5596
• CVE-2019-5489