Is CVE-2026-9258 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9258 being exploited in the wild.

How severe is CVE-2026-9258?

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; Canon EOS Utility 3.12.0 through 3.20.20.

Is there a fix for CVE-2026-9258?

A patch was published on 2026-06-15: Fixed in EOS Utility Ver.3.20.21 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-9258 attacked?

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

Am I affected by CVE-2026-9258?

Check whether you run Canon EOS Network Setting Tool or Canon EOS Utility 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-2026-9258: Canon EOS Network Setting Tool improper SSH host key validation

CVE-2026-9258 · Severity: medium · CVSS 6.5 · Published 2026-06-16

A security vulnerability exists in the Canon EOS Network Setting Tool, a utility used to configure network connections for Canon cameras. If exploited, an attacker could intercept and steal sensitive login credentials used for transferring photos and videos via SFTP. This could lead to unauthorized access to storage servers where media files are kept.

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

Quick answers

Is CVE-2026-9258 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9258 being exploited in the wild.
How severe is CVE-2026-9258?: 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; Canon EOS Utility 3.12.0 through 3.20.20.
Is there a fix for CVE-2026-9258?: A patch was published on 2026-06-15: Fixed in EOS Utility Ver.3.20.21 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-9258 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9258?: Check whether you run Canon EOS Network Setting Tool or Canon EOS Utility 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

The Canon EOS Network Setting Tool (versions 1.5.0 and earlier) contains a CWE-295 (Improper Certificate Validation) vulnerability specifically regarding SSH host keys. During SFTP communication tests, the application does not verify the identity of the remote server's host key. A network-positioned attacker could perform a man-in-the-middle (MitM) attack to intercept the connection. Successful exploitation requires minimal user interaction and allows the attacker to capture sensitive authentication credentials. Canon has released EOS Utility version 3.20.21 to address this issue.

Affected products

Canon EOS Network Setting Tool 1.5.0 and earlier
Canon EOS Utility 3.12.0 through 3.20.20

Timeline

2026-06-15: disclosed
2026-06-15: patched: Fixed in EOS Utility Ver.3.20.21
2026-06-16: advisory

References

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