Cisco Application Policy Infrastructure Controller API Command Injection (cisco-sa-apic-cmdinj-L6VR4E7)

#TRUSTED 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
#TRUST-RSA-SHA256 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
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(364471);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/12");

  script_cve_id("CVE-2026-20321");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwv43177");
  script_xref(name:"CISCO-SA", value:"cisco-sa-apic-cmdinj-L6VR4E7");
  script_xref(name:"IAVA", value:"2026-A-1089");

  script_name(english:"Cisco Application Policy Infrastructure Controller API Command Injection (cisco-sa-apic-cmdinj-L6VR4E7)");

  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 Application Policy Infrastructure Controller (APIC) is affected by a
vulnerability.

  - A command injection vulnerability exists in the web-based management API due to insufficient input validation
    of user-controlled command arguments. An authenticated, remote attacker can exploit this, by sending a
    specially crafted request, to execute arbitrary commands as root on the underlying operating system.
    (CVE-2026-20321)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.");
  # https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-cmdinj-L6VR4E7
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?41f0d7cf");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwv43177");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwv43177");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:N");
  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:H/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-20321");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(544);

  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:application_policy_infrastructure_controller");
  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_apic_version.nbin");
  script_require_keys("installed_sw/Cisco APIC Software");

  exit(0);
}

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

var port = get_http_port(default:443);
var product_info = cisco::get_product_info(name:'Cisco APIC Software', port:port);

var vuln_ranges = [
  {'min_ver': '0.0',    'fix_ver': '5.99', 'fix_display': 'See vendor advisory'},
  {'min_ver': '6.0',    'fix_ver': '6.0(9h)'},
  {'min_ver': '6.1',    'fix_ver': '6.1(6g)'},
  {'min_ver': '6.2',    'fix_ver': '6.2(3g)'}
];

var reporting = make_array(
  'port'          , 0,
  'severity'      , SECURITY_HOLE,
  'version'       , product_info['version'],
  'bug_id'        , 'CSCwv43177',
  'disable_caveat', TRUE
);

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