How severe is CVE-2021-36666?

CVE-2021-36666 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-2021-36666 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36666?

CVE-2021-36666 affects Druva Insync Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36666?

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-2021-36666 published?

CVE-2021-36666 was published on 2022-07-12 and last updated on 2026-07-05.

CVE-2021-36666

CVE-2021-36666 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-426.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-426
Affected product: Druva Insync Client
Published: 2022-07-12
Last modified: 2026-07-05

Description

An issue was discovered in Druva 6.9.0 for MacOS, allows attackers to gain escalated local privileges via the inSyncDecommission.

Frequently asked questions

What is CVE-2021-36666?: An issue was discovered in Druva 6.9.0 for MacOS, allows attackers to gain escalated local privileges via the inSyncDecommission.
How severe is CVE-2021-36666?: CVE-2021-36666 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-2021-36666 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36666?: CVE-2021-36666 affects Druva Insync Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36666?: 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-2021-36666 published?: CVE-2021-36666 was published on 2022-07-12 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:a:druva:insync_client:*:*:*:*:*:macos:*:*

More vulnerabilities in Druva Insync Client

CVE-2021-36668 — High (CVSS 7.8): URL injection in Driva inSync 6.9.0 for MacOS, allows attackers to force a visit to an arbitrary url via the port…
CVE-2021-36667 — High (CVSS 7.8): Command injection vulnerability in Druva inSync 6.9.0 for MacOS, allows attackers to execute arbitrary commands via…
CVE-2021-36665 — High (CVSS 7.8): An issue was discovered in Druva 6.9.0 for macOS, allows attackers to gain escalated local privileges via the…
CVE-2020-5752 — High (CVSS 7.8): Relative path traversal in Druva inSync Windows Client 6.6.3 allows a local, unauthenticated attacker to execute…
CVE-2019-3999 — High (CVSS 7.8): Improper neutralization of special elements used in an OS command in Druva inSync Windows Client 6.5.0 allows a local,…

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