# CVE-2026-6787: Usage of a hard-coded cryptographic key in WatchGuard Agent allows inclusion of code into existing process

> Hard-coded cryptographic keys in WatchGuard Agent allow attackers to inject code into existing processes on Windows systems.

- **Severity:** High 8.5 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 May 2026
- **Updated:** 10 Aug 2026
- **Also known as:** GHSA-m376-6rq6-f84p

## What is CVE-2026-6787?

CVE-2026-6787 is a high-severity vulnerability in WatchGuard Agent, published on 6 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Use of Hard-coded Cryptographic Key vulnerability in WatchGuard Agent on Windows allows Inclusion of Code in Existing Process.

Weakness: CWE-321 (Use of Hard-coded Cryptographic Key)

## Which versions are affected by CVE-2026-6787?

It affects 1 product.


Products: Watchguard Agent.

## How do I fix CVE-2026-6787?

No fix has been published for CVE-2026-6787 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6787 being exploited?

There is no known exploitation of CVE-2026-6787 in the wild and no public exploit code.

## Other vulnerabilities in WatchGuard Agent

- [CVE-2026-6788](https://insights.sbomify.com/CVE-2026-6788/): Uncontrolled search path in PluginLauncher allows SYSTEM code execution in WatchGuard Agent (high 8.5)
- [CVE-2026-41288](https://insights.sbomify.com/CVE-2026-41288/): WatchGuard Agent on Windows Privilege Escalation Vulnerability (high 7.3)
- [CVE-2026-41286](https://insights.sbomify.com/CVE-2026-41286/): Stack-based Buffer Overflow in WatchGuard Agent Discovery Service on Windows Causes Denial of Service - Variant B (high 7.1)
- [CVE-2026-41287](https://insights.sbomify.com/CVE-2026-41287/): Stack-based Buffer Overflow in WatchGuard Agent Discovery Service on Windows Causes Denial of Service - Variant A (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6787 and fix it if it is affected.

What it is: CVE-2026-6787 is a high-severity vulnerability in WatchGuard Agent, published on 6 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6787 in the wild and no public exploit code.

Affected product: WatchGuard Agent. 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-2026-6787/ (Markdown: https://insights.sbomify.com/CVE-2026-6787/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6787
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6787
- OSV: https://osv.dev/vulnerability/CVE-2026-6787

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6787/
Summaries are generated and may contain mistakes; the official description above is the record.