---
id: CVE-2026-87827
title: >-
  Certain KGUARD DVR devices running vulnerable firmware expose a system command
  execution service on all network interfaces without requiring authentication
summary: >-
  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
  ca…
severity: critical
cvss: 10
cvssVector: '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'
cwe:
  - CWE-1188
vendor: KGUARD
product: KGUARD_firmware
affected:
  - KGUARD_firmware
published: '2026-09-09'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T15:37:49.157'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87827'
references:
  - url: >-
      https://blog.netlab.360.com/mirai_ptea-botnet-is-exploiting-undisclosed-kguard-dvr-vulnerability-en/
    label: 5a6e4751-2f3f-4070-9419-94fb35b644e8
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-09T12:27:47.183838Z'
cvssSource: cna
ingestedAt: '2026-09-10T14:24:30.994Z'
epss: 0.0108
epssPercentile: 0.63637
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.