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PatchSiren cyber security CVE debrief

CVE-2026-9258 Canon Inc. CVE debrief

CVE-2026-9258 is a HIGH-severity vulnerability (CVSS Score: 7.1) affecting Canon EOS Network Setting Tool Version 1.5.0 or earlier. The vulnerability is caused by improper validation of SSH host keys. This vulnerability was published on 2026-06-16T00:16:35.460Z and has not been modified since its publication.

Vendor
Canon Inc.
Product
EOS Network Setting Tool for Windows
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-16
Original CVE updated
2026-06-18
Advisory published
2026-06-16
Advisory updated
2026-06-18

Who should care

Users of Canon EOS Network Setting Tool Version 1.5.0 or earlier should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by improper validation of SSH host keys in Canon EOS Network Setting Tool Version 1.5.0 or earlier. This could potentially allow an attacker to compromise the security of the system.

Defensive priority

HIGH

Recommended defensive actions

  • Users should update Canon EOS Network Setting Tool to a version that is not vulnerable.
  • Users should follow the vendor's advisory information for mitigation strategies.

Evidence notes

The vendor of this product is likely Canon, based on the evidence from reference_domain_candidate.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9258 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9258

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9258 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9258

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://canon.jp/support/support-info/260615vulnerability-response

    f98c90f0-e9bd-4fa7-911b-51993f3571fd

  • Source reference

    Unverified legacy reference

    URL: https://psirt.canon/advisory-information/cp2026-005/

    f98c90f0-e9bd-4fa7-911b-51993f3571fd

  • Source reference

    Unverified legacy reference

    URL: https://www.canon-europe.com/support/product-security/

    f98c90f0-e9bd-4fa7-911b-51993f3571fd

  • Source reference

    Unverified legacy reference

    URL: https://www.usa.canon.com/about-us/to-our-customers/cpa2026-005-vulnerability-remediation-for-eos-network-setting-tool

    f98c90f0-e9bd-4fa7-911b-51993f3571fd

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.