How severe is CVE-2019-3999?

CVE-2019-3999 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-3999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3999?

CVE-2019-3999 affects Druva Insync Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3999?

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-2019-3999 published?

CVE-2019-3999 was published on 2020-02-25 and last updated on 2026-06-17.

CVE-2019-3999

CVE-2019-3999 is a high-severity vulnerability in Druva Insync Client with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 9% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Druva Insync Client
Published: 2020-02-25
Last modified: 2026-06-17

Description

Improper neutralization of special elements used in an OS command in Druva inSync Windows Client 6.5.0 allows a local, unauthenticated attacker to execute arbitrary operating system commands with SYSTEM privileges.

Frequently asked questions

What is CVE-2019-3999?: Improper neutralization of special elements used in an OS command in Druva inSync Windows Client 6.5.0 allows a local, unauthenticated attacker to execute arbitrary operating system commands with SYSTEM privileges.
How severe is CVE-2019-3999?: CVE-2019-3999 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-3999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3999?: CVE-2019-3999 affects Druva Insync Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3999?: 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-2019-3999 published?: CVE-2019-3999 was published on 2020-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:druva:insync_client:6.5.0:*:*:*:*:*:*:*

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