# CVE-2026-9261: Weak cryptography in EOS Network Setting Tool for Windows

> Weak SSH algorithms in Canon EOS Network Setting Tool allow attackers to bypass security controls, requiring users to upgrade the software.

- **Severity:** High 7.6 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **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 available:** No
- **Published:** 15 Jun 2026
- **Updated:** 18 Jun 2026
- **Also known as:** GHSA-7f48-x95j-2r8c

## What is CVE-2026-9261?

CVE-2026-9261 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

Use of weak SSH cryptographic algorithms in Canon EOS Network Setting Tool Version 1.5.0 or earlier

Weakness: CWE-327 (Use of a Broken or Risky Cryptographic Algorithm)

## Which versions are affected by CVE-2026-9261?

It affects 1 product.


Products: Canon Eos Network Setting Tool.

## How do I fix CVE-2026-9261?

No fix has been published for CVE-2026-9261 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-9261 being exploited?

There is no known exploitation of CVE-2026-9261 in the wild and no public exploit code.

## Other vulnerabilities in Canon Inc. EOS Network Setting Tool for Windows

- [CVE-2026-9258](https://insights.sbomify.com/CVE-2026-9258/): Security feature bypass in EOS Network Setting Tool for Windows (high 7.1)
- [CVE-2026-9259](https://insights.sbomify.com/CVE-2026-9259/): Security feature bypass in EOS Network Setting Tool for Windows (high 7.1)
- [CVE-2026-9262](https://insights.sbomify.com/CVE-2026-9262/): Misconfiguration in EOS Network Setting Tool for Windows (high 7.1)
- [CVE-2026-9260](https://insights.sbomify.com/CVE-2026-9260/): Hardcoded credentials in EOS Network Setting Tool for Windows (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-9261 and fix it if it is affected.

What it is: CVE-2026-9261 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.
Exploitation: There is no known exploitation of CVE-2026-9261 in the wild and no public exploit code.

Affected product: Canon Inc. EOS Network Setting Tool for Windows. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-9261/ (Markdown: https://insights.sbomify.com/CVE-2026-9261/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-9261
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9261
- OSV: https://osv.dev/vulnerability/CVE-2026-9261

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-9261/
Summaries are generated and may contain mistakes; the official description above is the record.