Qnap QTS and QuTS Improper Link Resolution Before File Access (CVE-2025-66277)

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

include('compat.inc');

if (description)
{
  script_id(505221);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/10");

  script_cve_id("CVE-2025-66277");

  script_name(english:"Qnap QTS and QuTS Improper Link Resolution Before File Access (CVE-2025-66277)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A link following vulnerability has been reported to affect several
QNAP operating system versions. The remote attackers can then exploit
the vulnerability to traverse the file system to unintended locations.
We have already fixed the vulnerability in the following versions: QTS
5.2.8.3350 build 20251216 and later QuTS hero h5.3.2.3354 build
20251225 and later QuTS hero h5.2.8.3350 build 20251216 and later

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"https://www.qnap.com/en/security-advisory/qsa-26-05");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-66277");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(59);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/02/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/09");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:qnap:qts:5.2.8.3350");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:qnap:quts_hero:h5.2.8.3350");
  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) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Qnap');

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

var vuln_cpes = {
    "cpe:/o:qnap:qts:5.2.8.3350" :
        {"versionEndExcluding" : "5.2.8.3350", "versionStartIncluding" : "5.2.0", "family" : "QTS"},
    "cpe:/o:qnap:quts_hero:h5.2.8.3350" :
        {"versionEndExcluding" : "h5.2.8.3350", "versionStartIncluding" : "h5.2.0", "family" : "QuTShero"}
};

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