Microsoft Internet Explorer Use-After-Free Vulnerability

Microsoft Internet Explorer

Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code by accessing a pointer associated with a deleted object. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization. Can be chained with CVE-2010-0806. Added to CISA KEV on 2026-05-20 (federal deadline 2026-06-03).

First seen: 20 May 2026
Last update: 20 May 2026, 12:00 UTC
Identifiers: CVE-2010-0249
CVE-2010-0806
Source: CISA KEV

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Microsoft Internet Explorer Use-After-Free Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: Microsoft Internet Explorer
Ids: CVE-2010-0249, CVE-2010-0806

Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code by accessing a pointer associated with a deleted object. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization. Can be chained with CVE-2010-0806. Added to CISA KEV on 2026-05-20 (federal deadline 2026-06-03).

## Steps
1. Search the repo, its CI and infra config for Microsoft Internet Explorer. If present, report the version in use and whether it's affected.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2010-0249") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://learn.microsoft.com/en-us/security-updates/SecurityAdvisories/2010/979352 https://learn.microsoft.com/en-us/security-updates/securityadvisories/2010/981374 https://nvd.nist.gov/vuln/detail/CVE-2010-0249 https://nvd.nist.gov/vuln/detail/CVE-2010-0806
https://pwned.coffee/i/microsoft-internet-explorer-use-after-free-vulnerability

Sources

Totalone hot coffee