---
title: "CVE-2026-88197: Microsoft Office - Remote Code Execution"
description: "Microsoft Office contains a heap-based buffer overflow caused by improper memory handling, letting unauthorized attackers execute code remotely, exploit requires network access."
url: https://panop.io/threat-heartbeat/CVE-2026-88197/
---

# CVE-2026-88197 Microsoft Office - Remote Code Execution

Microsoft Office contains a heap-based buffer overflow caused by improper memory handling, letting unauthorized attackers execute code remotely, exploit requires network access.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.53% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-88197)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

13 October 2026

Updated

15 October 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Update to the latest version of Microsoft Office.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-88197](https://nvd.nist.gov/vuln/detail/CVE-2026-88197)
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88197](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88197)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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