Is CVE-2021-36665 in the CISA KEV catalog?

No. CVE-2021-36665 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-36665?

CVE-2021-36665 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-36665?

CVE-2021-36665 has an EPSS score of 0.47% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-36665?

Upgrade insync client to 7.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-36665

HIGH

7.8

CVSS v3

NVD

Description

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

CWE-502Deserialization of Untrusted Data

How to fix

Remediation Available

insync clientNVD

Affected:< 7.0.0Fixed in:7.0.0CVE-2021-36665derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.47%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Patch1

imhotepisinvisible.com

Vendor Advisory1

docs.druva.com

Product1

druva.com

Related Vulnerabilities

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-0669	High	7.2	100%	KEV + Ransom	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-35464	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-29300	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-53770	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-47986	Critical	9.8	100%	KEV + Ransom	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-05.