Microsoft Internet Explorer's Use-After-Free Gives Remote Attackers Code Execution via a Pointer to a Deleted Object; CISA's June 3rd KEV Deadline Has Passed for This End-of-Life Browser

Last refreshed2026-09-27

Status: KEV | Advisory ID: CVE-2010-0249

Key Details

CVE	CVE-2010-0249
Vulnerability Name	Microsoft Internet Explorer Use-After-Free Vulnerability
Affected products	Microsoft Internet Explorer
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-416 (Use After Free)
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-05-20.
Exploitation prediction (EPSS)	91.94% probability of exploitation in the next 30 days (100% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-06-03 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
Microsoft	Internet Explorer

Vendor

Product

Affected Versions

Patch Status

Microsoft

Internet Explorer

Subsystems	General OT
Sectors	Multiple

What to Know

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.

What to Do

Monitor Microsoft's web page for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2010-0249
CVE	https://www.cve.org/CVERecord?id=CVE-2010-0249

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2010-0249

CVE

https://www.cve.org/CVERecord?id=CVE-2010-0249

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-05-20
Required Action Due Date	2026-06-03
Required Action	Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-05-20

Required Action Due Date

2026-06-03

Required Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.