An issue was discovered in Kaseya Virtual System Administrator (VSA) through 9.4.0.37.

published 2019-08-26 7y ago modified 2026-06-17 4mo ago also EUVD-2019-6494

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

An issue was discovered in Kaseya Virtual System Administrator (VSA) through 9.4.0.37. It has a critical information disclosure vulnerability. An unauthenticated attacker can send properly formatted requests to the web application and download sensitive files and information. For example, the /DATAREPORTS directory can be farmed for reports. Because this directory contains the results of reports such as NMAP, Patch Status, and Active Directory domain metadata, an attacker can easily collect this critical information and parse it for information. There are a number of directories affected.

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Exploit prediction

1.81% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	7.8	AV:N/AC:L/Au:N/C:C/I:N/A:N

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

help.kaseya.com /WebHelp/EN/RN/index.asp#VSAReleaseNotes.htm
release-notes, vendor-advisory
dfdrconsulting.com /2019/cyber-security/cve-2019-15506-kaseya-vsa-critical-information-disclosure-unauthenticated-access/
third-party-advisory

Sources

CVE List CVE-2019-15506
NVD CVE-2019-15506

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