Vulnerability in Microsoft 365 Apps for Enterprise

[ Description ]Official description

Buffer underwrite ('buffer underflow') in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

[ Fixes ]Fixes and patches

• Patch on msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Advisories ]Government CERT advisories

• CERT-FR14 Oct 2026CERTFR-2026-AVI-1312

  Multiple vulnerabilities in Microsoft Office Translated from French

  Multiple vulnerabilities have been discovered in Microsoft Office. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and a breach of data confidentiality. Microsoft reports…

  CVE-2026-102857CVE-2026-97742CVE-2026-102855+136 more CVEs
• BSI CERT-Bund13 Oct 2026WID-SEC-2026-3916

  Microsoft Office products: Multiple vulnerabilities allow privilege escalation Translated from German

  CVE-2026-108433CVE-2026-97743CVE-2026-97011+209 more CVEs
• NCSC-NL13 Oct 2026NCSC-2026-0422

  Vulnerabilities fixed in Microsoft Office Translated from Dutch

  Probability/damage M/HCVE-2026-100209CVE-2026-100210CVE-2026-100211+171 more CVEs

[ References ]References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97008PatchVendor Advisory