Hikvision DVR Improper Authentication (CVE-2025-66174)

medium Tenable OT Security Plugin ID 504870

Synopsis

The remote OT asset is affected by a vulnerability.

Description

There is an improper authentication vulnerability in some Hikvision DVR products. Due to the improper implementation of authentication for the serial port, an attacker with physical access could exploit this vulnerability by connecting to the affected products and run a series of commands.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: Medium

ID: 504870

File Name: tenable_ot_hikvision_CVE-2025-66174.nasl

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 12/23/2025

Updated: 2/20/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2025-66174

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:hikvision:ds-7204hghi-f1_firmware, cpe:/o:hikvision:ds-7104hghi-f1_firmware

Required KB Items: Tenable.ot/Hikvision

Exploit Ease: No known exploits are available

Patch Publication Date: 12/19/2025

Vulnerability Publication Date: 12/19/2025

Reference Information

CVE: CVE-2025-66174

CWE: 287

Detections

Analytics