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CVE-2019-3999

47
FAUCET Score

CVE-2019-3999 is a critical OS command injection vulnerability in Druva inSync Windows Client version 6.5.0, allowing a local, unauthenticated attacker to execute arbitrary commands with SYSTEM privileges. With a CVSS score of 7.8 (HIGH), this flaw has a low attack complexity and requires local access, but can lead to complete compromise of confidentiality, integrity, and availability. While not on the KEV catalog, exploit modules are publicly available in Metasploit and ExploitDB, indicating a high potential for exploitation, despite a lack of community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
6.5.0CPE matchmatch criteria
cpe:2.3:a:druva:insync_client:6.5.0:*:*:*:*:*:*:*

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
8.57%
Probability of exploitation in next 30 days
EPSS Percentile
94.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Metasploit: Druva inSync inSyncCPHwnet64.exe RPC Type 5 Privilege Escalation · Feb 25, 2020
ExploitDB: EDB-48400 · Apr 29, 2020
This CVE's current EPSS score of 0.0857 is in the 99th percentile among its peer group of 16,994 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

Vendor Patches (6)

boschvendor investigatingvia llm_extracted
maxkbvendor investigatingvia llm_extracted
nxpvendor investigatingvia llm_extracted
openfirevendor investigatingvia llm_extracted
openstackvendor investigatingvia llm_extracted
opnsensevendor investigatingvia llm_extracted

Vendor Advisories (6)

maxkbllm-maxkb-3bdca785e1d525afHIGH

Druva inSync Client Multiple Vulnerabilities

Feb 25, 2020
openstackllm-openstack-fa18218d1dedf258HIGH

Druva inSync Client Multiple Vulnerabilities

Feb 25, 2020
nxpllm-nxp-488d04d2cdfb5643HIGH

Druva inSync Client Multiple Vulnerabilities

Feb 25, 2020
boschllm-bosch-88cceaa23fed1601HIGH

Druva inSync Client Multiple Vulnerabilities

Feb 25, 2020
opnsensellm-opnsense-38fd04e7fe0c0ca9HIGH

Druva inSync Client Multiple Vulnerabilities

Feb 25, 2020
openfirellm-openfire-41f01ef05eadff84HIGH

Druva inSync Client Multiple Vulnerabilities

Feb 25, 2020

References

packetstormsecurity.com / files/157493/Druva-inSync-Windows-Client-6.5.2-Privilege-Escalation.html
ExploitThird Party AdvisoryVDB Entry
packetstormsecurity.com / files/157680/Druva-inSync-inSyncCPHwnet64.exe-RPC-Type-5-Privilege-Escalation.html
ExploitThird Party AdvisoryVDB Entry
tenable.com / security/research/tra-2020-12
ExploitThird Party Advisory