Cisco Unified Communications Manager (CUCM) Remote Code Execution (cisco-sa-voice-rce-mORhqY4b)

#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(296364);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/02");

  script_cve_id("CVE-2026-20045");
  script_xref(name:"CISCO-BUG-ID", value:"CSCwr21851");
  script_xref(name:"CISCO-SA", value:"cisco-sa-voice-rce-mORhqY4b");
  script_xref(name:"IAVA", value:"2026-A-0082");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2026/02/11");

  script_name(english:"Cisco Unified Communications Manager (CUCM) Remote Code Execution (cisco-sa-voice-rce-mORhqY4b)");

  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, the remote Cisco Unified Communications Manager is affected by a remot code
execution vulnerability:

  - A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session
    Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P),
    Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker
    to execute arbitrary commands on the underlying operating system of an affected device. This vulnerability is due to
    improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending
    a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful
    exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate
    privileges to root. (CVE-2026-20045)

Please see the included Cisco BID and Cisco Security Advisory for more information.");
  # https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-rce-mORhqY4b
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3417e480");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwr21851");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwr21851.");
  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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-20045");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/01/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/23");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:unified_communications_manager");
  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_ucm_detect.nbin");
  script_require_keys("Host/Cisco/CUCM/Version");

  exit(0);
}

include('ccf.inc');

var product_info = cisco::get_product_info(name:'Cisco Unified Communications Manager');

var version_active = get_kb_item('Host/Cisco/show_version_active');
if ('CSCwr21851' >< version_active)
  audit(AUDIT_HOST_NOT, 'affected due to an installed security patch');

var vuln_ranges = [
  {'min_ver':'12.5', 'fix_ver':'12.9999'},
  {'min_ver':'14', 'fix_ver':'14.0.1.15900'},
  {'min_ver':'15', 'fix_ver':'15.0.1.14900'}
];

var reporting = make_array(
  'port'          , 0,
  'severity'      , SECURITY_HOLE,
  'version'       , product_info['version'],
  'bug_id'        , 'CSCwr21851',
  'fix'           , 'See vendor advisory',
  'disable_caveat', TRUE
);

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