CVE-2021-47807

Name: CVE-2021-47807
Creator: NVD / NIST
Published: 2026-01-16T00:16:25.52+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.5/10EPSS 0.21%

Last modified Jun 17, 2026

CVE-2021-47807 is a high-severity vulnerability rated 8.5/10 on the CVSS scale. Sync Breeze 13.6.18 contains an unquoted service path vulnerability in its Windows service configuration that allows local attackers to potentially execute arbitrary code. Attackers can exploit the unquoted path in service binaries located in 'Program Files' directories to inject malicious executables and escalate privileges.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

Sync Breeze 13.6.18 contains an unquoted service path vulnerability in its Windows service configuration that allows local attackers to potentially execute arbitrary code. Attackers can exploit the unquoted path in service binaries located in 'Program Files' directories to inject malicious executables and escalate privileges.

Metrics

CVSS 3.1

7.8/10

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

CVSS 4.0

8.5/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.21%

11.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-428

Affected Software

Vendor	Product	Versions
Flexense	Sync Breeze	13.6.18

References

https://www.exploit-db.com/exploits/50023Exploit
https://www.syncbreeze.com/Product
https://www.vulncheck.com/advisories/sync-breeze-multiple-unquoted-service-pathThird Party Advisory
https://www.exploit-db.com/exploits/50023Exploit

Timeline

Published: Jan 16, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-47807?

How severe is CVE-2021-47807?

CVE-2021-47807 has a CVSS score of 8.5/10 (HIGH severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47807?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-47807?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST