CVE-2026-21139 Samsung Continuity Service - Broken Access Control

Samsung Continuity Service for Windows < 4.6.1217.0 contains an improper access control vulnerability caused by insufficient restrictions, letting adjacent attackers manipulate connected mobile devices, exploit requires network adjacency.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control, Data Tampering
CVSS vector
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/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
Published
12 October 2026
Updated
15 October 2026

Vendor fix

Update to version 4.6.1217.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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