CVE-2026-9258
Published: 16 June 2026
Summary
CVE-2026-9258 is a high-severity Improper Certificate Validation (CWE-295) vulnerability in Canon Eos Network Setting Tool. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Adversary-in-the-Middle (T1557); ranked at the 18.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-37018
Vulnerability details
Improper validation of SSH host keys in Canon EOS Network Setting Tool Version 1.5.0 or earlier
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper SSH host key validation (CWE-295) directly enables adversary-in-the-middle attacks against SSH sessions initiated by the affected client tool.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
When certificates are used to establish component provenance, the control requires correct certificate validation procedures.
Mandates approved trust anchors and issuance policies, directly preventing acceptance of unvalidated or untrusted certificates.
Correct system time is required for proper enforcement of certificate notBefore/notAfter dates and time-based revocation checks.