Vulnerability · Published Jun 15, 2026 · Assigned by Canon
CVE-2026-9259
Medium 6.5
In plain English
A medium-severity improper certificate validation in EOS Network Setting Tool for macOS from Canon Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 90.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper validation of server certificates in Canon EOS Network Setting Tool Version 1.5.0 or earlier
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Canon Inc. | EOS Network Setting Tool for Windows | 1.5.0 or earlier |
| Canon Inc. | EOS Network Setting Tool for macOS | 1.5.0 or earlier |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
References
- https://psirt.canon/advisory-information/cp2026-005/ vendor-advisory
- https://canon.jp/support/support-info/260615vulnerability-response vendor-advisory
- https://www.usa.canon.com/about-us/to-our-customers/cpa2026-005-vulnerability-remediation-for-eos-network-setting-tool vendor-advisory
- https://www.canon-europe.com/support/product-security/ vendor-advisory