Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

• cpe microsoft/365 appsversion unspecified
• cpe microsoft/microsoft 365version unspecified
• cpe microsoft/office 2021version unspecified
• cpe microsoft/office 2024version unspecified
• microsoft Microsoft Office 365 for Macversion unspecified
• microsoft Microsoft Office LTSC 2024 for 32-bit editionsversion unspecified
• microsoft Microsoft Office LTSC 2024 for 64-bit editionsversion unspecified
• microsoft Microsoft Office LTSC for Mac 2021version unspecified
• microsoft Microsoft Office LTSC for Mac 2024version unspecified

How to fix CVE-2026-88210

• Recommended remediation

  A patch or advisory reference is linked. Open the original publisher for availability by product version.

• Official advisories

  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • Microsoft Security Update Guide · msrc.microsoft.com
  • NIST NVD · nvd.nist.gov

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Oct 13, 2026 · NIST NVD

   Detected

   Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

2. Oct 14, 2026 · NIST NVD

   Updated

   Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

3. Oct 15, 2026 · NIST NVD

   Updated

   Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

Sources

• CVE.orgVulnerability recordCVE-2026-88210

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-88210

  30-day exploitation probability 0.4%

  first.org
• Microsoft Security Update GuideVendor advisoryCVE-2026-88210

  Microsoft Office LTSC for Mac 2024, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC 2024 for 32-bit editions

  msrc.microsoft.com
• NIST NVDVulnerability recordCVE-2026-88210

  Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

  nvd.nist.gov

References

• Vendor Advisory · msrc.microsoft.com

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.