CVE-2021-33778 - Vulnerability Details - OpenCVE

Description

HEVC Video Extensions Remote Code Execution Vulnerability

Published: 2021-07-14

Score: 7.8 High

EPSS: 2.4% 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	< 1.0.41531.0

Configuration 1 [-]

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

No data.

No data available yet.

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

Source	ID	Title
EUVD	EUVD-2021-20455	HEVC Video Extensions Remote Code Execution Vulnerability

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

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.02361.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33778
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33778

History

Mon, 10 Aug 2026 15:30:00 +0000

Type	Values Removed	Values Added
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33778

Tue, 01 Oct 2024 16:30:00 +0000

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

Subscriptions

Microsoft Hevc Video Extensions

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2021-07-14T17:53:50.000Z

Updated: 2026-08-10T15:11:39.987Z

Reserved: 2021-05-28T00:00:00.000Z

Link: CVE-2021-33778

Vulnrichment

Updated: 2024-08-03T23:58:23.085Z

NVD

Status : Modified

Published: 2021-07-14T18:15:10.720

Modified: 2026-08-10T16:17:41.810

Link: CVE-2021-33778

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

NVD-CWE-noinfo

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