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Security Advisory; NCSC-2026-0352 [1.0.0]

Security Advisory
NCSC-2026-0352 [1.0.0]
Publicatie
08-09-2026 20:48 (Europe/Amsterdam)
Prioriteit
Normaal
Betreft
Kwetsbaarheden verholpen in Microsoft Office

Kenmerken

  • External Control of File Name or Path
  • Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
  • Stack-based Buffer Overflow
  • Heap-based Buffer Overflow
  • Out-of-bounds Read
  • Buffer Over-read
  • Improper Null Termination
  • Integer Overflow or Wraparound
  • Integer Underflow (Wrap or Wraparound)
  • Off-by-one Error
  • Numeric Truncation Error
  • Generation of Error Message Containing Sensitive Information
  • Execution with Unnecessary Privileges
  • Origin Validation Error
  • Improper Verification of Cryptographic Signature
  • Time-of-check Time-of-use (TOCTOU) Race Condition
  • Double Free
  • Use After Free
  • NULL Pointer Dereference
  • Exposure of Sensitive System Information to an Unauthorized Control Sphere
  • Deserialization of Untrusted Data
  • Insufficiently Protected Credentials
  • Use of Client-Side Authentication
  • Untrusted Pointer Dereference
  • Access of Resource Using Incompatible Type ('Type Confusion')
  • Missing Authorization
  • Use of Uninitialized Resource
  • Server-Side Request Forgery (SSRF)

Omschrijving

Microsoft heeft 114 kwetsbaarheden verholpen in diverse Office producten.

Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de categorieën schade, zoals genoemd in onderstaande tabel.

Voor succesvol misbruik moet de kwaadwillende het slachtoffer misleiden een malafide bestand te openen of link te volgen.

Microsoft heeft voor Office 114 kwetsbaarheden verholpen. De 4 ernstigste kwetsbaarheden bevinden zich in meerdere Office componenten en hebben een CVSS score van 9.8 toegewezen gekregen. Kwaadwillenden met toegang tot deze componenten kunnen zonder voorafgaande authenticatie mogelijk code uitvoeren of zich toegang verschaffen tot het kwetsbare systeem. Deze kwetsbaarheden zijn in onderstaande tabel weergegeven.

De overige 110 kwetsbaarheden variëren in ernst van middelmatig tot hoog en kritiek. Raapleeg het MSRC-portaal voor aanvullende informatie.

|----------------|------|---------------------------|-------------------------------------|
| CVE-ID         | CVSS | Component                 | Impact                              |
|----------------|------|---------------------------|-------------------------------------|
| CVE-2026-78505 | 9,80 | Office                    | Uitvoeren van willekeurige code     | 
|----------------|------|---------------------------|-------------------------------------|
| CVE-2026-78509 | 9,80 | Outlook                   | Uitvoeren van willekeurige code     | 
|----------------|------|---------------------------|-------------------------------------|
| CVE-2026-78510 | 9,80 | Outlook                   | Uitvoeren van willekeurige code     | 
|----------------|------|---------------------------|-------------------------------------|
| CVE-2026-66302 | 9,80 | SKYPE                     | Uitvoeren van willekeurige code     | 
|----------------|------|---------------------------|-------------------------------------|

Oplossingen

Microsoft heeft updates beschikbaar gesteld waarmee de beschreven kwetsbaarheden worden verholpen. We raden u aan om deze updates te installeren. Meer informatie over de kwetsbaarheden, de installatie van de updates en eventuele work-arounds vindt u op:

https://portal.msrc.microsoft.com/en-us/security-guidance

Referenties

CVE's

Producten

Microsoft
Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Access 2016 (32-bit edition)
Microsoft Access 2016 (64-bit edition)
Microsoft Excel 2016 (32-bit edition)
Microsoft Excel 2016 (64-bit edition)
Microsoft Office 2016 (32-bit edition)
Microsoft Office 2016 (64-bit edition)
Microsoft Office 2019 for 32-bit editions
Microsoft Office 2019 for 64-bit editions
Microsoft Office 365 for Mac
Microsoft Office LTSC 2021 for 32-bit editions
Microsoft Office LTSC 2021 for 64-bit editions
Microsoft Office LTSC 2024 for 32-bit editions
Microsoft Office LTSC 2024 for 64-bit editions
Microsoft Office LTSC for Mac 2021
Microsoft Office LTSC for Mac 2024
Microsoft Office for Android
Microsoft Outlook 2016 (32-bit edition)
Microsoft Outlook 2016 (64-bit edition)
Microsoft PowerPoint 2016 (32-bit edition)
Microsoft PowerPoint 2016 (64-bit edition)
Microsoft Publisher 2016 (32-bit edition)
Microsoft Publisher 2016 (64-bit edition)
Microsoft SharePoint Enterprise Server 2016

Disclaimer

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.