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Mozilla Firefox ESR < 115.43

🗓️ 13 Oct 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 4 Views

Mozilla Firefox ESR on Windows is affected by multiple vulnerabilities.

Related
Refs
Code
ReporterTitlePublishedViews
Family
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CVE-2026-109706
13 Oct 202612:53
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CVE-2026-109710
13 Oct 202612:56
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CVE-2026-109712
13 Oct 202612:57
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CVE-2026-109715
13 Oct 202612:59
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CVE-2026-109716
13 Oct 202613:00
–circl
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CVE-2026-109718
13 Oct 202613:01
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CVE-2026-109719
13 Oct 202613:02
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CVE-2026-109722
13 Oct 202613:04
–circl
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CVE-2026-109725
13 Oct 202613:06
–circl
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CVE-2026-109726
13 Oct 202613:07
–circl
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#%NASL_MIN_LEVEL 80900
## 
# (C) Tenable, Inc.
#                                  
# The descriptive text and package checks in this plugin were
# extracted from Mozilla Foundation Security Advisory mfsa2026-107.
# The text itself is copyright (C) Mozilla Foundation.
## 

include('compat.inc');

if (description)
{
  script_id(365309);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/13");

  script_cve_id(
    "CVE-2026-109706",
    "CVE-2026-109710",
    "CVE-2026-109712",
    "CVE-2026-109715",
    "CVE-2026-109716",
    "CVE-2026-109718",
    "CVE-2026-109719",
    "CVE-2026-109722",
    "CVE-2026-109725",
    "CVE-2026-109726",
    "CVE-2026-109727",
    "CVE-2026-109728",
    "CVE-2026-109729",
    "CVE-2026-109730",
    "CVE-2026-109732",
    "CVE-2026-109733",
    "CVE-2026-109753"
  );

  script_name(english:"Mozilla Firefox ESR < 115.43");

  script_set_attribute(attribute:"synopsis", value:
"A web browser installed on the remote Windows host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Firefox ESR installed on the remote Windows host is prior to 115.43. It is, therefore, affected by
multiple vulnerabilities as referenced in the mfsa2026-107 advisory.

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://www.mozilla.org/en-US/security/advisories/mfsa2026-107/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Firefox ESR version 115.43 or later.");
  script_set_attribute(attribute:"risk_factor", value:"High");

  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:"2026/10/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:firefox_esr");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

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

  script_dependencies("mozilla_org_installed.nasl");
  script_require_keys("installed_sw/Mozilla Firefox ESR");

  exit(0);
}

include('vdf.inc');

# @tvdl-content-verify-only
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "requires": [
    {
      "scope": "target",
      "match": {
        "os": "windows"
      }
    }
  ],
  "checks": [
    {
      "product": {
        "name": "Mozilla Firefox ESR",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        {
          "min_version": "115.0.0",
          "fixed_version": "115.43"
        }
      ]
    }
  ]
};

var vdf_result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_HOLE);
vdf::handle_check_and_report_errors(vdf_result:vdf_result);

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13 Oct 2026 00:00Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.15.4
EPSS0.00242
SSVC
4