NCSC-2026-0242

Vulnerability from csaf_ncscnl - Published: 2026-07-16 14:56 - Updated: 2026-07-16 14:56
Summary
Kwetsbaarheden verholpen in Mozilla Firefox
Notes
The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten: Mozilla heeft kwetsbaarheden verholpen in Firefox, specifiek in versie 152.0.6.
Interpretaties: Door een combinatie van twee kwetsbaarheden is het mogelijk voor kwaadwillenden op afstand malafide code uit te voeren op systemen van slachtoffers. Voor succesvol misbruik moeten gebruikers een malafide website of een legitieme website met malafide advertenties bezoeken. Mozilla geeft aan dat exploitcode voor de kwetsbaarheden publiek beschikbaar is. Dit vergroot de kans op misbruik. Tot op heden zijn er geen aanvallen waargenomen die deze kwetsbaarheden in het wild benutten. De technische details van de kwetsbaarheden zijn niet openbaar gemaakt, maar de aanwezigheid van exploitcode wijst op een potentieel risico indien de update niet wordt toegepast.
Oplossingen: Firefox updates worden automatisch gedaan. Voor organisaties waar dit niet geldt, raadt het NCSC aan om de update handmatig uit te voeren. Mozilla heeft updates uitgebracht in versie 152.0.6 om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans: medium
Schade: high
CWE-763: Release of Invalid Pointer or Reference
CVE-2026-15719

Exploit code for a vulnerability fixed in Firefox 152.0.6 is publicly available, though no attacks exploiting it in the wild have been reported.

5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Affected products
Product Identifier Version Remediation
vers:unknown/*
Mozilla / Firefox
 vers:unknown/*
CVE-2026-15718

Exploit code for a vulnerability fixed in Firefox 152.0.6 is publicly available, though no attacks exploiting it in the wild have been reported.

4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE-763 - Release of Invalid Pointer or Reference
Affected products
Product Identifier Version Remediation
vers:unknown/*
Mozilla / Firefox
 vers:unknown/*
References
To clipboard 

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Mozilla heeft kwetsbaarheden verholpen in Firefox, specifiek in versie 152.0.6.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "Door een combinatie van twee kwetsbaarheden is het mogelijk voor kwaadwillenden op afstand malafide code uit te voeren op systemen van slachtoffers. Voor succesvol misbruik moeten gebruikers een malafide website of een legitieme website met malafide advertenties bezoeken.\n\nMozilla geeft aan dat exploitcode voor de kwetsbaarheden publiek beschikbaar is. Dit vergroot de kans op misbruik.\n\nTot op heden zijn er geen aanvallen waargenomen die deze kwetsbaarheden in het wild benutten. De technische details van de kwetsbaarheden zijn niet openbaar gemaakt, maar de aanwezigheid van exploitcode wijst op een potentieel risico indien de update niet wordt toegepast. ",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Firefox updates worden automatisch gedaan. Voor organisaties waar dit niet geldt, raadt het NCSC aan om de update handmatig uit te voeren. \n\nMozilla heeft updates uitgebracht in versie 152.0.6 om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "medium",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Release of Invalid Pointer or Reference",
        "title": "CWE-763"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-67/"
      }
    ],
    "title": "Kwetsbaarheden verholpen in Mozilla Firefox",
    "tracking": {
      "current_release_date": "2026-07-16T14:56:25.053244Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
        }
      },
      "id": "NCSC-2026-0242",
      "initial_release_date": "2026-07-16T14:56:25.053244Z",
      "revision_history": [
        {
          "date": "2026-07-16T14:56:25.053244Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-1"
                }
              }
            ],
            "category": "product_name",
            "name": "Firefox"
          }
        ],
        "category": "vendor",
        "name": "Mozilla"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-15719",
      "notes": [
        {
          "category": "description",
          "text": "Exploit code for a vulnerability fixed in Firefox 152.0.6 is publicly available, though no attacks exploiting it in the wild have been reported.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-15719 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-15719.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-15719"
    },
    {
      "cve": "CVE-2026-15718",
      "cwe": {
        "id": "CWE-763",
        "name": "Release of Invalid Pointer or Reference"
      },
      "notes": [
        {
          "category": "other",
          "text": "Release of Invalid Pointer or Reference",
          "title": "CWE-763"
        },
        {
          "category": "description",
          "text": "Exploit code for a vulnerability fixed in Firefox 152.0.6 is publicly available, though no attacks exploiting it in the wild have been reported.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-15718 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-15718.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-15718"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.