# CVE-2026-87827: KGUARD DVR unauthenticated remote command execution vulnerability

> Unauthenticated attackers can execute arbitrary system commands on KGUARD DVR devices, leading to full compromise and botnet recruitment.

- **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Sep 2026
- **Updated:** 9 Sep 2026
- **Also known as:** GHSA-mxww-3qmj-g8p3

## What is CVE-2026-87827?

CVE-2026-87827 is a critical command injection vulnerability in KGUARD_firmware, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Certain KGUARD DVR devices running vulnerable firmware expose a system command execution service on all network interfaces without requiring authentication. A remote unauthenticated attacker with network access to the affected service can execute arbitrary system commands on the device, potentially resulting in complete compromise of the DVR.

The vulnerability is known to have been exploited in the wild by the Mirai_ptea (Rimasuta) and Mirai_aurora botnets for malware propagation and subsequent DDoS activity. The vulnerability was reported to affect firmware dating from 2016, while firmware released after 2017 appears to mitigate the issue by restricting the affected service to the localhost interface (127.0.0.1) instead of exposing it on all interfaces (0.0.0.0).

The affected-device list reported by Netlab includes many D1004NR, D1008NR, D1016NR, D1104, D1104NR, D1108NR, D1116NR, D1132NR, D2116NR, D97xx, D98xx, and D99xx variants and several associated hardware revisions

The exploit is included in some version of rapperbot and exploited in 2026. This assignment has been made to document the active exploitation and lack of documentation from the vendor.

Weakness: CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2026-87827?


## How do I fix CVE-2026-87827?

No fix has been published for CVE-2026-87827 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-87827 being exploited?

There is no known exploitation of CVE-2026-87827 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-87827 and fix it if it is affected.

What it is: CVE-2026-87827 is a critical command injection vulnerability in KGUARD_firmware, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-87827 in the wild and no public exploit code.

Affected product: KGUARD_firmware. 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-2026-87827/ (Markdown: https://insights.sbomify.com/CVE-2026-87827/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-87827
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-87827
- OSV: https://osv.dev/vulnerability/CVE-2026-87827

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-87827/
Summaries are generated and may contain mistakes; the official description above is the record.