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CVE-2021-36665

27
FAUCET Score

CVE-2021-36665 describes a local privilege escalation vulnerability in Druva inSync Client for macOS, specifically version 6.9.0. This flaw, categorized as CWE-502 (Deserialization of Untrusted Data), allows an authenticated local attacker to gain elevated privileges through the inSyncUpgradeDaemon. With a CVSS score of 7.8 (High), successful exploitation could lead to complete compromise of confidentiality, integrity, and availability on the affected system. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.0.0CPE matchmatch criteria
cpe:2.3:a:druva:insync_client:*:*:*:*:*:macos:*:*
< 7.0.0CPE matchmatch criteria
cpe:2.3:a:druva:insync_client:*:*:*:*:*:windows:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
40.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 80th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.druva.com / Knowledge_Base/Security_Update/Security_Advisory_for_inSync_Client_7.0.1_and_before
Vendor Advisory
imhotepisinvisible.com / druva-lpe
ExploitPatchTechnical DescriptionThird Party Advisory