CVE-2015-6589Public exploitNetwork attack vector

Authenticated code execution via unrestricted upload paths

Published Feb 13, 2020 · Updated Aug 6, 2024

Path traversal in Kaseya Virtual System Administrator allows remote authenticated users to write and execute arbitrary server files. The json.ashx HTTP handler accepts a supplied destination path without restricting traversal, enabling an ASP file to be placed under WebPages and executed by IIS. Authentication and a valid console window identifier are required; affected releases span 7.0.0.0 through 7.0.0.32, 8.0.0.0 through 8.0.0.22, 9.0.0.0 through 9.0.0.18, and 9.1.0.0 through 9.1.0.8.

CVSS severity8.8
High
EPSS probability13.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Kaseya Virtual System Administrator allows remote authenticated users to write and execute arbitrary server files. The json.ashx HTTP handler accepts a supplied destination path without restricting traversal, enabling an ASP file to be placed under WebPages and executed by IIS. Authentication and a valid console window identifier are required; affected releases span 7.0.0.0 through 7.0.0.32, 8.0.0.0 through 8.0.0.22, 9.0.0.0 through 9.0.0.18, and 9.1.0.0 through 9.1.0.8.

The record

CVE
CVE-2015-6589
Published
Feb 13, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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