CVE-2026-87827

KGUARD DVR unauthenticated remote command execution vulnerability

Published Sep 9, 2026 CVSS 4.0 · 10 Critical EPSS 1.1% KEV · Not listed

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.

Analysis

Technical impact

Certain KGUARD DVR devices expose a command execution service on all network interfaces without authentication. A remote attacker with network access can run arbitrary system commands, leading to full compromise of the device. The flaw stems from improper input validation and processing (CWE‑1188).

Affected Systems

Affected devices include KGUARD firmware appliances such as D1004NR, D1008NR, D1016NR, D1104, D1104NR, D1108NR, D1116NR, D1132NR, D2116NR, D97xx, D98xx, and D99xx variants. Firmware dated from 2016 is vulnerable; versions released after 2017 mitigate the issue by limiting the service to localhost.

Risk and Exploitability

The vulnerability carries a CVSS score of 10. It has been actively exploited by the Mirai_ptea (Rimasuta) and Mirai_aurora botnets for malware distribution and DDoS attacks. The EPSS score is 1%, indicating a low but nonzero probability of exploitation, and the lack of a KEV listing does not reduce the observed exploitation. Any network host with access to the exposed service can execute arbitrary commands, giving the attacker complete control over the DVR.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

KGUARD

KGUARD_firmware

unaffected

Version	Status	Constraints
`0`	unknown	≤ *

No data.

Vendor Product Versions

Kguard

Kguard Firmware

Version	Status	Scheme	Platform
`[0,*]`	unaffected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade the DVR firmware to a version released after 2017 that restricts the command execution service to localhost.
Apply a network firewall rule to block external connections to the vulnerable service interface, allowing only local host traffic.
Continuously monitor device logs for suspicious command execution activity and consider disabling the service if it is unnecessary.

Generated by OpenCVE AI on September 10, 2026 at 14:44 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: 1.1% (1.080% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact total

References

Link	Providers
https://blog.netlab.360.com/mirai_ptea-botnet-is-exploiting-undisclosed-kguard-dvr-vulnerability-en/

History

Sep 13, 2026 8:30 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Kguard Kguard kguard Firmware
Vendors & Products		Kguard Kguard kguard Firmware

Sep 9, 2026 1:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Sep 9, 2026 11:00 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		KGUARD DVR unauthenticated remote command execution vulnerability
Weaknesses		CWE-1188
References		https://blog.netlab.360.com/mirai_ptea-botnet-is-exploiting-undisclosed-kguard-dvr-vulnerability-en/
Metrics		cvssV4_0 `{'score': 10, 'vector': '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'}`