Is CVE-2026-9259 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9259 being exploited in the wild.

How severe is CVE-2026-9259?

Medium severity, with a CVSS score of 6.5, published 16 June 2026.

Which products and versions are affected?

Canon EOS Network Setting Tool 1.5.0 and earlier.

Is there a fix for CVE-2026-9259?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-9259 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-9259?

Check whether you run Canon EOS Network Setting Tool at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-9259: Canon EOS Network Setting Tool improper certificate validation

CVE-2026-9259 · Severity: medium · CVSS 6.5 · Published 2026-06-16

A vulnerability exists in the Canon EOS Network Setting Tool, a utility used to configure network connections for Canon cameras. An attacker could potentially intercept sensitive login credentials used for file transfers (FTP/FTPS/SFTP) by tricking the software into connecting to a malicious server. This could lead to the theft of account information and unauthorized access to image storage servers.

Technologies: Canon EOS Network Setting Tool. Vendors: Canon.

Quick answers

Is CVE-2026-9259 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9259 being exploited in the wild.
How severe is CVE-2026-9259?: Medium severity, with a CVSS score of 6.5, published 16 June 2026.
Which products and versions are affected?: Canon EOS Network Setting Tool 1.5.0 and earlier.
Is there a fix for CVE-2026-9259?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-9259 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9259?: Check whether you run Canon EOS Network Setting Tool at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Canon EOS Network Setting Tool version 1.5.0 and earlier (included with EOS Utility Ver.3.12.0 through Ver.3.20.20) contains a CWE-295 vulnerability due to improper validation of server certificates. The flaw exists within the FTP/FTPS/SFTP communication test functions. A remote attacker can exploit this by performing a man-in-the-middle (MitM) attack or by inducing a user to connect to a rogue server, allowing for the disclosure of sensitive authentication credentials. Users are advised to update to EOS Utility Ver.3.20.21 or later to resolve the issue.

Affected products

Canon EOS Network Setting Tool 1.5.0 and earlier

Timeline

2026-06-15: disclosed: Initial disclosure by Canon Inc.
2026-06-16: advisory: NVD publication date

References

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