CVE-2026-9259 Security feature bypass in EOS Network Setting Tool for Windows
Attackers can bypass TLS certificate validation in Canon EOS Network Setting Tool, enabling man-in-the-middle attacks against network configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-9259?
CVE-2026-9259 is a high-severity vulnerability in Canon Inc. EOS Network Setting Tool for Windows, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper validation of server certificates in Canon EOS Network Setting Tool Version 1.5.0 or earlier
Weakness: CWE-295
Which versions are affected by CVE-2026-9259?
It affects 1 product.
Products include Canon Eos Network Setting Tool.
How do I fix CVE-2026-9259?
No fix has been published for CVE-2026-9259 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9259 being exploited?
There is no known exploitation of CVE-2026-9259 in the wild and no public exploit code.
Other vulnerabilities in Canon Inc. EOS Network Setting Tool for Windows
Sources
Also known as GHSA-v5vr-c46f-3vhm.