Recorded 16 Oct 2026 at 16:13 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.

The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.

The historical “Publicly disclosed: No” field could represent a missing MSRC assessment. It does not establish that the vulnerability was undisclosed. The original recorded fields remain below.

CVEMicrosoft Security Response Center

Web Media Extensions Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code over a network.

What it said

CVE: CVE-2026-81352
Severity: Critical
CVSS base score: 8.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact: Remote Code Execution
Exploitation detected: Not reported by MSRC
Publicly disclosed: No
Exploitability: Exploitation Unlikely
Component: Microsoft Windows Codecs Library
Weakness: CWE-122: Heap-based Buffer Overflow
Issued by: Microsoft
Customer action: Required: apply the update
Affected products: Web Media Extensions on Windows 10 Version 21H2 for 32-bit Systems, Web Media Extensions on Windows 10 Version 21H2 for ARM64-based Systems, Web Media Extensions on Windows 10 Version 21H2 for x64-based Systems, Web Media Extensions on Windows 10 Version 22H2 for 32-bit Systems, Web Media Extensions on Windows 10 Version 22H2 for ARM64-based Systems, Web Media Extensions on Windows 10 Version 22H2 for x64-based Systems, Web Media Extensions on Windows 11 Version 23H2 for ARM64-based Systems, Web Media Extensions on Windows 11 Version 23H2 for x64-based Systems, Web Media Extensions on Windows 11 Version 24H2 for ARM64-based Systems, Web Media Extensions on Windows 11 Version 24H2 for x64-based Systems, Web Media Extensions on Windows 11 Version 25H2 for ARM64-based Systems, Web Media Extensions on Windows 11 Version 25H2 for x64-based Systems, Web Media Extensions on Windows 11 Version 26H1 for ARM64-based Systems, Web Media Extensions on Windows 11 version 26H1 for x64-based Systems
Updates that fix it: No KB listed
CISA KEV: Not listed in the collected catalog
EPSS: 0.5%; scored 16 Oct 2026
Public exploit code: No Nuclei template listed
Published: 8 Sep 2026 07:00 UTC
Last revised: 14 Oct 2026 07:00 UTC
Revision note: Updated product information in the Software Update table. This is an informational change only.

Recorded links

Source evidence when recorded

Microsoft security releases: Complete at observationRead 16 Oct 2026 at 16:12 UTC
CISA KEV: Complete at observationRead 16 Oct 2026 at 16:12 UTC
FIRST EPSS: Complete at observationRead 16 Oct 2026 at 16:12 UTC
Public detection templates (Nuclei): Complete at observationRead 16 Oct 2026 at 16:12 UTC

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

What changed

Publisher revision note: Information published. → Updated product information in the Software Update table. This is an informational change only.
15 Oct 2026

Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

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Field-level log (6)

Up to 100 recent field edits are shown; older edits may be outside retention.

16 Oct 2026 · 16:13:25 UTC EPSS0.5%; scored 15 Oct 2026 → 0.5%; scored 16 Oct 2026
15 Oct 2026 · 21:30:54 UTC EPSS0.5%; scored 14 Oct 2026 → 0.5%; scored 15 Oct 2026
15 Oct 2026 · 07:14:54 UTC Revision noteInformation published. → Updated product information in the Software Update table. This is an informational change only.
15 Oct 2026 · 07:14:54 UTC Last revised8 Sep 2026 07:00 UTC → 14 Oct 2026 07:00 UTC
15 Oct 2026 · 01:07:54 UTC EPSS0.5%; scored 13 Oct 2026 → 0.5%; scored 14 Oct 2026
14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current