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Recorded 10 Nov 2026 at 18:32 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

CVEMicrosoft Security Response Center

HEIF Image Extensions Remote Code Execution Vulnerability

Use after free in HEIF Image Extensions allows an unauthorized attacker to execute code locally.

What it said

CVE
CVE-2026-100204
Severity
Important
CVSS base score
7.0
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
Exploitation detected
No known exploitation (MSRC assessment)
Publicly disclosed
No (MSRC assessment)
Exploitability
Exploitation Less Likely
Component
HEIF Image Extensions
Weakness
CWE-416: Use After Free
Issued by
Microsoft
Customer action
Required: follow the MSRC remediation guidance
Affected products
HEIF Image Extension on Windows 10 version 1809, HEIF Image Extension on Windows 10 version 21H2, HEIF Image Extension on Windows 10 version 22H2, HEIF Image Extension on Windows 11 version 23H2, HEIF Image Extension on Windows 11 version 24H2, HEIF Image Extension on Windows 11 version 25H2, HEIF Image Extension on Windows 11 version 26H1, HEIF Image Extension on Windows 11 version 26H2
Updates that fix it
No KB listed
CISA KEV
Not listed in the collected catalog
EPSS
No EPSS score collected
Public detection template
No Nuclei template listed
Published
10 Nov 2026 08:00 UTC
Last revised
10 Nov 2026 08:00 UTC
Revision note
Information published.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 10 Nov 2026 at 18:30 UTC
CISA KEV
Complete at observationRead 10 Nov 2026 at 18:30 UTC
FIRST EPSS
Complete at observationRead 10 Nov 2026 at 18:30 UTC
Public detection templates (Nuclei)
Complete at observationRead 10 Nov 2026 at 18:30 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 11 Nov 05:47 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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