CVE-2026-9259 PUBLISHED

Assigner: Canon
Reserved: 21.05.2026 Published: 15.06.2026 Updated: 16.06.2026

Improper validation of server certificates in Canon EOS Network Setting Tool Version 1.5.0 or earlier

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS Score: 6.5

CVSS 3.1

Vendor	Canon Inc.
Product	EOS Network Setting Tool for Windows
Versions	Default: unaffected Version 1.5.0 or earlier is affected

Vendor	Canon Inc.
Product	EOS Network Setting Tool for macOS
Versions	Default: unaffected Version 1.5.0 or earlier is affected