# CVE-2026-25815: Weak cryptography in FortiOS

> Attackers can decrypt LDAP credentials from FortiOS configuration files due to a shared default encryption key, exposing sensitive authentication data.

- **Severity:** Low 3.2 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Feb 2026
- **Updated:** 9 Feb 2026
- **Also known as:** GHSA-867w-ffwp-rh44

## What is CVE-2026-25815?

CVE-2026-25815 is a low-severity vulnerability in Fortinet FortiOS, published on 5 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Fortinet FortiOS through 7.6.6 allows attackers to decrypt LDAP credentials stored in device configuration files, as exploited in the wild from 2025-12-16 through 2026 (by default, the encryption key is the same across all customers' installations). NOTE: the Supplier's position is that the instance of CWE-1394 is not a vulnerability because customers "are supposed to enable" a non-default option that eliminates the weakness. However, that non-default option can disrupt functionality as shown in the "Managing FortiGates with private data encryption" document, and is therefore intentionally not a default option.

Weakness: CWE-1394 (Use of Default Cryptographic Key)

## Which versions are affected by CVE-2026-25815?


## How do I fix CVE-2026-25815?

No fix has been published for CVE-2026-25815 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25815 being exploited?

There is no known exploitation of CVE-2026-25815 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25815 and fix it if it is affected.

What it is: CVE-2026-25815 is a low-severity vulnerability in Fortinet FortiOS, published on 5 Feb 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-2026-25815 in the wild and no public exploit code.

Affected product: Fortinet FortiOS. 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-2026-25815/ (Markdown: https://insights.sbomify.com/CVE-2026-25815/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25815
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25815
- OSV: https://osv.dev/vulnerability/CVE-2026-25815

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25815/
Summaries are generated and may contain mistakes; the official description above is the record.