How severe is CVE-2015-6589?

CVE-2015-6589 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-6589 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6589?

CVE-2015-6589 affects Kaseya Virtual System Administrator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-6589?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-6589 published?

CVE-2015-6589 was published on 2020-02-13 and last updated on 2026-06-17.

CVE-2015-6589

CVE-2015-6589 is a high-severity vulnerability in Kaseya Virtual System Administrator with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Kaseya Virtual System Administrator
Published: 2020-02-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2015-6589?: 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.
How severe is CVE-2015-6589?: CVE-2015-6589 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-6589 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6589?: CVE-2015-6589 affects Kaseya Virtual System Administrator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-6589?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-6589 published?: CVE-2015-6589 was published on 2020-02-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kaseya:virtual_system_administrator:*:*:*:*:*:*:*:*

More vulnerabilities in Kaseya Virtual System Administrator

CVE-2015-6922 — Critical (CVSS 9.8): Kaseya Virtual System Administrator (VSA) 7.x before 7.0.0.33, 8.x before 8.0.0.23, 9.0 before 9.0.0.19, and 9.1 before…
CVE-2018-20753 — Critical (CVSS 9.8): Kaseya VSA RMM before R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5 allows unprivileged remote attackers…
CVE-2019-15506 — High (CVSS 7.5): An issue was discovered in Kaseya Virtual System Administrator (VSA) through 9.4.0.37. It has a critical information…
CVE-2017-12410 — High (CVSS 7.4): It is possible to exploit a Time of Check & Time of Use (TOCTOU) vulnerability by winning a race condition when Kaseya…
CVE-2015-2863 — Medium (CVSS 4.3): Open redirect vulnerability in Kaseya Virtual System Administrator (VSA) 7.x before 7.0.0.29, 8.x before 8.0.0.18, 9.0…
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