CVE-2026-58599 - Vulnerability Details

- HEVC Video Extensions Remote Code Execution Vulnerability

Description

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

Published: 2026-09-08

Score: 7.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Microsoft

HEVC Video Extensions

affected

Version	Status	Constraints
`1.0.0`	affected	< 2.4.87.0

Microsoft

HEVC Video Extensions for Licensed Applications

affected

Version	Status	Constraints
`2.0.0.0`	affected	< 2.4.85.0

Microsoft

HEVC Video Extensions from Device Manufacturer

affected

Version	Status	Constraints
`2.0.0.0`	affected	< 2.4.86.0

Configuration 1 [-]

cpe:2.3:a:microsoft:hevc_video_extensions:*:*:*:*:*:*:*:*

Configuration 2 [-]

cpe:2.3:a:microsoft:hevc_video_extensions_for_licensed_applications:*:*:*:*:*:*:*:*

Configuration 3 [-]

AND

cpe:2.3:a:microsoft:hevc_video_extensions_from_device_manufacturer:*:*:*:*:*:*:*:*

OR	cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*
	cpe:2.3:o:microsoft:windows_10_1809:::::::x86:*
	cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_10_21h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_10_21h2:::::::x86:*
	cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_10_22h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_10_22h2:::::::x86:*
	cpe:2.3:o:microsoft:windows_11_22h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_22h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_23h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2019:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2022:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*

Configuration 4 [-]

AND

cpe:2.3:a:microsoft:hevc_video_extensions_from_device_manufacturer:*:*:*:*:*:*:*:*

OR	cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:*

No data.

Vendor Product Confidence Versions

Microsoft

Hevc Video Extensions

90%

Version	Status	Scheme	Platform
`[1.0.0,2.4.87.0)`	affected	generic	—

Microsoft

Hevc Video Extensions For Licensed Appplications

90%

Version	Status	Scheme	Platform
`[2.0.0.0,2.4.85.0)`	affected	generic	—

Microsoft

Hevc Video Extensions From Device Manufacturer

90%

Version	Status	Scheme	Platform
`[2.0.0.0,2.4.86.0)`	affected	generic	['windows_10_version_1809_for_32-bit_systems', 'windows_10_version_1809_for_x64-based_systems', 'windows_10_version_21h2_for_32-bit_systems', 'windows_10_version_21h2_for_arm64-based_systems', 'windows_10_version_21h2_for_x64-based_systems', 'windows_10_version_22h2_for_32-bit_systems', 'windows_10_version_22h2_for_arm64-based_systems', 'windows_10_version_22h2_for_x64-based_systems', 'windows_11_version_23h2_for_arm64-based_systems', 'windows_11_version_23h2_for_x64-based_systems', 'windows_11_version_24h2_for_arm64-based_systems', 'windows_11_version_24h2_for_x64-based_systems', 'windows_11_version_25h2_for_arm64-based_systems', 'windows_11_version_25h2_for_x64-based_systems', 'windows_11_version_26h1_for_arm64-based_systems', 'windows_11_version_26h1_for_x64-based_systems', 'windows_server_2019', 'windows_server_2019_(server_core_installation)', 'windows_server_2022', 'windows_server_2022_(server_core_installation)', 'windows_server_2025', 'windows_server_2025_(server_core_installation)']

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Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00477.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58599

History

Thu, 01 Oct 2026 16:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Microsoft hevc Video Extensions For Licensed Applications Microsoft windows 10 1809 Microsoft windows 10 21h2 Microsoft windows 10 22h2 Microsoft windows 11 22h2 Microsoft windows 11 23h2 Microsoft windows 11 24h2 Microsoft windows 11 25h2 Microsoft windows 11 26h1 Microsoft windows Server 2019 Microsoft windows Server 2022 Microsoft windows Server 2025
CPEs		cpe:2.3:a:microsoft:hevc_video_extensions_for_licensed_applications:::::::: cpe:2.3:o:microsoft:windows_10_1809:::::::x64:* cpe:2.3:o:microsoft:windows_10_1809:::::::x86:* cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64:* cpe:2.3:o:microsoft:windows_10_21h2:::::::x64:* cpe:2.3:o:microsoft:windows_10_21h2:::::::x86:* cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64:* cpe:2.3:o:microsoft:windows_10_22h2:::::::x64:* cpe:2.3:o:microsoft:windows_10_22h2:::::::x86:* cpe:2.3:o:microsoft:windows_11_22h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_22h2:::::::x64:* cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_23h2:::::::x64:* cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:* cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:* cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:* cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:* cpe:2.3:o:microsoft:windows_server_2019:::::::x64:* cpe:2.3:o:microsoft:windows_server_2022:::::::x64:* cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*
Vendors & Products		Microsoft hevc Video Extensions For Licensed Applications Microsoft windows 10 1809 Microsoft windows 10 21h2 Microsoft windows 10 22h2 Microsoft windows 11 22h2 Microsoft windows 11 23h2 Microsoft windows 11 24h2 Microsoft windows 11 25h2 Microsoft windows 11 26h1 Microsoft windows Server 2019 Microsoft windows Server 2022 Microsoft windows Server 2025

Wed, 09 Sep 2026 17:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 08 Sep 2026 17:30:00 +0000

Type	Values Removed	Values Added
Description		Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code locally.
Title		HEVC Video Extensions Remote Code Execution Vulnerability
First Time appeared		Microsoft Microsoft hevc Video Extensions Microsoft hevc Video Extensions For Licensed Appplications Microsoft hevc Video Extensions From Device Manufacturer
Weaknesses		CWE-122
CPEs		cpe:2.3:a:microsoft:hevc_video_extensions:::::::: cpe:2.3:a:microsoft:hevc_video_extensions_for_licensed_appplications:::::::: cpe:2.3:a:microsoft:hevc_video_extensions_from_device_manufacturer::::::::
Vendors & Products		Microsoft Microsoft hevc Video Extensions Microsoft hevc Video Extensions For Licensed Appplications Microsoft hevc Video Extensions From Device Manufacturer
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58599
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}`

Subscriptions

Microsoft Hevc Video Extensions Hevc Video Extensions For Licensed Applications Hevc Video Extensions For Licensed Appplications Hevc Video Extensions From Device Manufacturer Windows 10 1809 Windows 10 21h2 Windows 10 22h2 Windows 11 22h2 Windows 11 23h2 Windows 11 24h2 Windows 11 25h2 Windows 11 26h1 Windows Server 2019 Windows Server 2022 Windows Server 2025

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-09-08T17:16:52.655Z

Updated: 2026-09-30T15:22:47.373Z

Reserved: 2026-07-01T18:03:43.124Z

Link: CVE-2026-58599

Vulnrichment

Updated: 2026-09-09T15:41:57.293Z

NVD

Status : Analyzed

Published: 2026-09-08T18:17:43.797

Modified: 2026-10-01T16:32:47.040

Link: CVE-2026-58599

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-09-08T20:00:12Z

Weaknesses

CWE-122
Heap-based Buffer Overflow

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

Exploitation none

Automatable no

Technical Impact total

Subscriptions

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