Security Updates for Microsoft SQL Server (April 2026)

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

include('compat.inc');

if (description)
{
  script_id(307037);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/08");

  script_cve_id("CVE-2026-32167", "CVE-2026-32176", "CVE-2026-33120");
  script_xref(name:"MSKB", value:"5084816");
  script_xref(name:"MSKB", value:"5084815");
  script_xref(name:"MSKB", value:"5084818");
  script_xref(name:"MSKB", value:"5084820");
  script_xref(name:"MSKB", value:"5084821");
  script_xref(name:"MSKB", value:"5084817");
  script_xref(name:"MSKB", value:"5084819");
  script_xref(name:"MSKB", value:"5083252");
  script_xref(name:"MSKB", value:"5084814");
  script_xref(name:"MSKB", value:"5083245");
  script_xref(name:"MSFT", value:"MS26-5084816");
  script_xref(name:"MSFT", value:"MS26-5084815");
  script_xref(name:"MSFT", value:"MS26-5084818");
  script_xref(name:"MSFT", value:"MS26-5084820");
  script_xref(name:"MSFT", value:"MS26-5084821");
  script_xref(name:"MSFT", value:"MS26-5084817");
  script_xref(name:"MSFT", value:"MS26-5084819");
  script_xref(name:"MSFT", value:"MS26-5083252");
  script_xref(name:"MSFT", value:"MS26-5084814");
  script_xref(name:"MSFT", value:"MS26-5083245");
  script_xref(name:"IAVA", value:"2026-A-0341");

  script_name(english:"Security Updates for Microsoft SQL Server (April 2026)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft SQL Server installation on the remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The Microsoft SQL Server installation on the remote host is missing a security update. It is, therefore,
affected by the following vulnerabilities:

  - A privilege escalation vulnerability 
    (CVE-2026-32167, CVE-2026-32176)

  - A remote code execution vulnerability
    (CVE-2026-33120)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32167");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32176");
  script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33120");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:
  -KB5083245
  -KB5083252
  -KB5084814
  -KB5084815
  -KB5084816
  -KB5084817
  -KB5084818
  -KB5084819
  -KB5084820
  -KB5084821");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/AC:L/PR:L/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-2026-33120");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-32176");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/17");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sql_server");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("mssqlserver_detect.nasl");
  script_require_keys("Settings/ParanoidReport");
  script_require_ports(139, 445, 1433, "Services/mssql");

  exit(0);
}

var port = get_service(svc:'mssql', exit_on_fail:TRUE);
var instance = get_kb_item('MSSQL/' + port + '/InstanceName');
var version = get_kb_item_or_exit('MSSQL/' + port + '/Version');

# detection isn't grabbing the last bit of the version so these are VERY FP prone
if (report_paranoia < 2) audit(AUDIT_PARANOID);

var ver = pregmatch(pattern:"^([0-9.]+)([^0-9]|$)", string:version);
if (!isnull(ver) && !isnull(ver[1])) ver = ver[1];


if (
  (ver_compare(ver:ver, minver:'17.0.4006.2',   fix: '17.0.4030.1') < 0) || 
  (ver_compare(ver:ver, minver:'17.0.1000.7',   fix: '17.0.1110.1') < 0) || 
  (ver_compare(ver:ver, minver:'16.0.4003.1',   fix: '16.0.4240.1') < 0) || 
  (ver_compare(ver:ver, minver:'16.0.1000.6',   fix: '16.0.1175.1') < 0) || 
  (ver_compare(ver:ver, minver:'15.0.4003.23',  fix: '15.0.4465.1') < 0) || 
  (ver_compare(ver:ver, minver:'15.0.2000.5',   fix: '15.0.2165.1') < 0) || 
  (ver_compare(ver:ver, minver:'14.0.3006.16',  fix: '14.0.3525.1') < 0) || 
  (ver_compare(ver:ver, minver:'14.0.1000.169', fix: '14.0.2105.1') < 0) || 
  (ver_compare(ver:ver, minver:'13.0.7000.253', fix: '13.0.7080.1') < 0) || 
  (ver_compare(ver:ver, minver:'13.0.6300.2',   fix: '13.0.6485.1') < 0)
)
{
  var report = '';
  if (!empty_or_null(version))  report += '\n  SQL Server Version   : ' + version;
  if (!empty_or_null(instance)) report += '\n  SQL Server Instance  : ' + instance;
  security_report_v4(port:port, extra:report, severity:SECURITY_HOLE);
}
else audit(AUDIT_INST_VER_NOT_VULN, 'MSSQL', version);