CVE-2013-10034Public exploitNetwork attack vector

Unauthenticated code execution via arbitrary ASP upload

Published Jul 31, 2025 · Updated May 15, 2026

Unrestricted file upload in Kaseya KServer before 6.3.0.2 allows remote attackers to execute code as IUSR without authentication. The /SystemTab/uploadImage.asp endpoint constructs a disk file from an unvalidated multipart filename, preserves its .asp extension, and permits traversal into arbitrary paths. The default upload directory is already within the web root, so invoking the uploaded ASP grants code execution with the web account's privileges.

CVSS severity9.3
Critical
EPSS probability1.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Kaseya KServer before 6.3.0.2 allows remote attackers to execute code as IUSR without authentication. The /SystemTab/uploadImage.asp endpoint constructs a disk file from an unvalidated multipart filename, preserves its .asp extension, and permits traversal into arbitrary paths. The default upload directory is already within the web root, so invoking the uploaded ASP grants code execution with the web account's privileges.

The record

CVE
CVE-2013-10034
Published
Jul 31, 2025
Updated
May 15, 2026
Vendor
Kaseya
Product
Kaseya Server
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2025CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.3.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kaseya · Kaseya Serverversion=0 <6.3.0.2

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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