Cisco NX-OS Software NX-API RCE (cisco-sa-napi-rce-r2shwu2j)

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

include('compat.inc');

if (description)
{
  script_id(364500);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/12");

  script_cve_id("CVE-2026-76471");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwu58579");
  script_xref(name:"CISCO-SA", value:"cisco-sa-napi-rce-r2shwu2j");
  script_xref(name:"IAVA", value:"2026-A-1091");

  script_name(english:"Cisco NX-OS Software NX-API RCE (cisco-sa-napi-rce-r2shwu2j)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, Cisco UCS Manager Software is affected by a vulnerability.

  - A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote
    attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an
    affected device. The vulnerability is due to insufficient input validation of data that is sent to
    the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API
    of an affected device. A successful exploit could allow the attacker to execute arbitrary code with root
    privileges and could cause process crashes, which could result in a reload of the device and a DoS
    condition. (CVE-2026-76471)

Please see the included Cisco BID and Cisco Security Advisory for more information.");
  # https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-napi-rce-r2shwu2j
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2639971d");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwu58579");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwu58579");
  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:"cvss_score_source", value:"CVE-2026-76471");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(122);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/09");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:unified_computing_system");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

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

  script_dependencies("cisco_ucs_manager_version.nasl");
  script_require_keys("installed_sw/cisco_ucs_manager");
  script_require_ports("Services/www", 80);

  exit(0);
}

include('ccf.inc');
include('http.inc');

var app = 'cisco_ucs_manager';
get_install_count(app_name:app, exit_if_zero:TRUE);

var port = get_http_port(default:80);
var install = get_single_install(app_name:app, port:port, exit_if_unknown_ver:TRUE);

var url = build_url(qs:install['path'], port:port);
var version = tolower(install['version']);

var product_info = make_array(
  'name'   , 'Cisco UCS Manager',
  'version', version
);

var vuln_ranges = [
  {'min_ver': '0.0', 'fix_ver': '4.3', 'fix_display': 'See vendor advisory'},
  {'min_ver': '4.3', 'fix_ver': '4.3(6j)'}
];

var reporting = make_array(
  'port'          , port,
  'severity'      , SECURITY_HOLE,
  'version'       , version,
  'extra'         , 'Version source    : ' + url,
  'bug_id'        , 'CSCwu58579',
  'disable_caveat', TRUE
);

cisco::check_and_report(
  product_info:product_info,
  reporting:reporting,
  vuln_ranges:vuln_ranges
);