Improper SSH Host Key Validation in Canon EOS Network Setting Tool
CVE-2026-9258

7.1HIGH

Key Information:

Vendor

Canon Inc.

Status
Eos Network Setting Tool For Windows
Eos Network Setting Tool For Mac OS
Vendor
CVE Published:
15 June 2026

What is CVE-2026-9258?

The Canon EOS Network Setting Tool versions up to 1.5.0 exhibit a vulnerability due to improper validation of SSH host keys. This flaw could potentially allow unauthorized access to the system, compromising the integrity and confidentiality of the data being transmitted. Users of this tool should be aware of the implications of this vulnerability and take necessary measures to secure their environment. It’s crucial to monitor for updates from Canon and apply patches promptly to mitigate risks. For further details, users can refer to Canon’s official advisories for remediation guidance.

Affected Version(s)

EOS Network Setting Tool for macOS 1.5.0 or earlier

EOS Network Setting Tool for Windows 1.5.0 or earlier

References

https://psirt.canon/advisory-information/cp2026-005/
vendor-advisory
https://canon.jp/support/support-info/260615vulnerability...
vendor-advisory
https://www.usa.canon.com/about-us/to-our-customers/cpa20...
vendor-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Ryan Hausknecht (@haus3c)
.