# CVE-2026-108971: D-Link DCS-930L Emergency HTTP Recovery Server bootloader_region.bin mpfd_decode signature verification

> Remote attackers can bypass cryptographic signature verification in the D-Link DCS-930L emergency recovery server to execute arbitrary code.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`)
- **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:** 13 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-5vhf-mw8w-298v

## What is CVE-2026-108971?

CVE-2026-108971 is a critical vulnerability in D-Link DCS-930L, published on 13 Oct 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

A flaw has been found in D-Link DCS-930L B1.08B4. This impacts the function mpfd_decode of the file bootloader_region.bin of the component Emergency HTTP Recovery Server. Executing a manipulation of the argument firmware can lead to improper verification of cryptographic signature. The attack may be performed from remote. The exploit has been published and may be used.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature), CWE-345 (Insufficient Verification of Data Authenticity)

## Which versions are affected by CVE-2026-108971?


## How do I fix CVE-2026-108971?

No fix has been published for CVE-2026-108971 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108971 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108971 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108971 and fix it if it is affected.

What it is: CVE-2026-108971 is a critical vulnerability in D-Link DCS-930L, published on 13 Oct 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108971 exists.

Affected product: D-Link DCS-930L. 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-2026-108971/ (Markdown: https://insights.sbomify.com/CVE-2026-108971/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108971
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108971
- OSV: https://osv.dev/vulnerability/CVE-2026-108971

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108971/
Summaries are generated and may contain mistakes; the official description above is the record.