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HIGHPOC

CVE-2015-6589

CWE-22Published: February 13, 2020· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Directory traversal vulnerability in Kaseya Virtual System Administrator (VSA) 7.0.0.0 before 7.0.0.33, 8..0.0.0 before 8.0.0.23, 9.0.0.0 before 9.0.0.19, and 9.1.0.0 before 9.1.0.9 allows remote authenticated users to write to and execute arbitrary files due to insufficient restrictions in file paths to json.ashx.

Technical Analysis

CVE-2015-6589 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

A proof-of-concept (PoC) exploit exists for CVE-2015-6589. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

kaseya1 product(s)

virtual system administrator

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://packetstormsecurity.com/files/133782/Kaseya-Virtual-System-Administrator-Code-Execution-Privilege-Escalation.html

ADVISORYhttp://www.zerodayinitiative.com/advisories/ZDI-15-450

ADVISORYhttps://www.exploit-db.com/exploits/38351/

ADVISORYhttps://www.securityfocus.com/bid/76838

ADVISORYhttp://packetstormsecurity.com/files/133782/Kaseya-Virtual-System-Administrator-Code-Execution-Privilege-Escalation.html

ADVISORYhttp://www.zerodayinitiative.com/advisories/ZDI-15-450

ADVISORYhttps://www.exploit-db.com/exploits/38351/

ADVISORYhttps://www.securityfocus.com/bid/76838

All References (8)

→

http://packetstormsecurity.com/files/133782/Kaseya-Virtual-System-Administrator-Code-Execution-Privilege-Escalation.htmlExploit · Third Party Advisory · VDB Entry

→

http://www.zerodayinitiative.com/advisories/ZDI-15-450Third Party Advisory · VDB Entry

→

https://www.exploit-db.com/exploits/38351/Exploit · Third Party Advisory · VDB Entry

→

https://www.securityfocus.com/bid/76838Third Party Advisory · VDB Entry

→

http://packetstormsecurity.com/files/133782/Kaseya-Virtual-System-Administrator-Code-Execution-Privilege-Escalation.htmlExploit · Third Party Advisory · VDB Entry

→

http://www.zerodayinitiative.com/advisories/ZDI-15-450Third Party Advisory · VDB Entry

→

https://www.exploit-db.com/exploits/38351/Exploit · Third Party Advisory · VDB Entry

→

https://www.securityfocus.com/bid/76838Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2015-6589

CVSS Score8.8 / 10

SeverityHIGH

WeaknessCWE-22

CISA KEVNo

ExploitPOC

Affected1 vendor(s)

PublishedFeb 13, 2020

Related CVEs (CWE-22)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2015-6589 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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