CVE-2026-9258
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper validation of SSH host keys in Canon EOS Network Setting Tool Version 1.5.0 or earlier
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceImproper validation of SSH host keys in Canon EOS Network Setting Tool Version 1.5.0 and earlier allows remote attackers to perform man-in-the-middle attacks by presenting a malicious SSH server, potentially exposing credentials or intercepting network configuration data.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 1.5.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Locate Canon EOS Network Setting Tool installationSearch for the application executable (typically named 'NetworkSettingTool.exe' or similar Canon network utility) in Program Files directories or the application's installation folderAffected if The application is found on the system
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Determine installed software versionRight-click the executable, select Properties, and check the Version or Product Version field in the Details tab; alternatively, check Add/Remove Programs or Programs and Features for Canon EOS Network Setting Tool versionAffected if The version is 1.5.0 or earlier, or the version cannot be determined but is assumed to be older than 1.5.1
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Verify if SSH functionality is in useReview the tool's configuration or connection history to determine if SSH connections to camera devices or network configurations have been establishedAffected if The tool has been used to make SSH connections to network devices
A user is affected if Canon EOS Network Setting Tool version 1.5.0 or earlier is installed AND the SSH connection feature has been used, exposing credentials or configuration data to potential man-in-the-middle attacks on the network.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped1.5.1
Update Canon EOS Network Setting Tool to a version later than 1.5.0 when available; until then, avoid using the tool on untrusted networks or verify SSH connections through alternative secure channels.
Version 1.5.1
- 1. Identify the current installed version of Canon EOS Network Setting Tool
- 2. Download the latest version (1.5.1 or later) from Canon's official support website (canon.jp, psirt.canon, canon-europe.com, or usa.canon.com)
- 3. Uninstall the current version of EOS Network Setting Tool
- 4. Install the updated version 1.5.1 or later
- 5. Verify the installation was successful and the version is correct
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
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Free · runs locallyCheck whether your project pulls in CVE-2026-9258 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-9258 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data