Hikvision DVR Improper Authentication (CVE-2025-66174)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(504870);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/20");

  script_cve_id("CVE-2025-66174");

  script_name(english:"Hikvision DVR Improper Authentication (CVE-2025-66174)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"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.");
  # https://www.hikvision.com/en/support/cybersecurity/security-advisory/serial-port-privilege-escalation-vulnerabilities-in-some-hikvision-nvr-devices/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6f2a6a63");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-66174");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(287);

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/12/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/23");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:hikvision:ds-7104hghi-f1_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:hikvision:ds-7204hghi-f1_firmware");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Hikvision");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Hikvision');

var asset = tenable_ot::assets::get(vendor:'Hikvision');

var vuln_cpes = {
    "cpe:/o:hikvision:ds-7104hghi-f1_firmware" :
        {"versionEndIncluding" : "4.30.122_201107", "family" : "HikvisionVideoRecordersValueSeries"},
    "cpe:/o:hikvision:ds-7204hghi-f1_firmware" :
        {"versionEndIncluding" : "4.30.122_201107", "family" : "HikvisionVideoRecorders"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);