Is CVE-2021-36667 in the CISA KEV catalog?

No. CVE-2021-36667 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-36667?

CVE-2021-36667 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-36667?

CVE-2021-36667 has an EPSS score of 1.82% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-36667?

Upgrade insync client to 7.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-36667

HIGHEPSS 76th pctl

7.8

CVSS v3

NVD

Description

Command injection vulnerability in Druva inSync 6.9.0 for MacOS, allows attackers to execute arbitrary commands via crafted payload to the local HTTP server due to un-sanitized call to the python os.system library.

CWE-78OS Command Injection

How to fix

Remediation Available

insync clientNVD

Affected:< 7.0.0Fixed in:7.0.0CVE-2021-36667derived 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

1.82%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Patch2

Product1

druva.com

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	100%	KEV	Fix

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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.