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Vulnerabilities

Vulnerability · CVE-2026-102855

Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized attacker to execute code over a network.

Published Oct 13, 2026 · catalog updated Oct 20, 2026 · 365 apps

Open the advisory

Exploitation likelihood is not on this record for CVE-2026-102855. A missing EPSS score is not a low risk. Compare 365 apps with the linked advisory before you change production.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
cpe microsoft/365 apps · cpe microsoft/office 2021 · cpe microsoft/office 2024

Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized attacker to execute code over a network.

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/office 2021version unspecified
  • cpe microsoft/office 2024version unspecified

How to fix CVE-2026-102855

What to do

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

Should you patch?

Exploitation likelihood is not on this record for CVE-2026-102855. A missing EPSS score is not a low risk. Compare 365 apps with the linked advisory before you change production.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-122: Heap-based Buffer Overflow. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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

    Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized attacker to execute code over a network.

  2. Oct 20, 2026 · NIST NVD

    Updated

    Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized attacker to execute code over a network.

Sources

  • CVE.orgVulnerability recordCVE-2026-102855

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-102855

    Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized attacker to execute code over a network.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 20, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.