What is the CVSS score of EUVD-2026-43921?

EUVD-2026-43921 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.7%.

Which versions of Windows Media are affected by EUVD-2026-43921?

A local privilege escalation vulnerability in Windows Media affects Windows 10, 11, and multiple Server editions, allowing authenticated local users to gain SYSTEM-level access.. A patch is available.

How to fix or mitigate EUVD-2026-43921?

Within 24 hours: Inventory all Windows 10 (1607+), Windows 11, and Windows Server systems (2012-2025) across the organization to identify exposure scope and prioritize critical infrastructure. Within 7 days: Deploy the Microsoft-released patch to all servers, domain controllers, and privileged access workstations. Within 30 days: Complete patch rollout to all remaining affected endpoints using standard change management to ensure no unpatched systems remain in production.

Windows Media EUVD-2026-43921

| CVE-2026-50433 HIGH

Use After Free (CWE-416)

2026-07-14 microsoft

GHSA-x8fv-9vfw-qhv9

Denial Of Service Use After Free Memory Corruption Microsoft Windows Server 2012 Windows Server 2016 Windows Server 2019 Windows Server 2022 Windows Server 2025 Windows 10 Version 1607 Windows 10 Version 1809 Windows 10 Version 21H2 Windows 10 Version 22H2 Windows Server 2016 Server Core Installation Windows Server 2019 Server Core Installation Windows 11 Version 24H2 Windows 11 Version 25H2 Windows 11 Version 26H1 Windows Server 2025 Server Core Installation Windows Server 2012 Server Core Installation Windows Server 2012 R2 Windows Server 2012 R2 Server Core Installation

7.8

CVSS 3.1 · Vendor: microsoft

Severity by source

Vendor (microsoft) PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

vuln.today AI

7.8 HIGH

Local privilege escalation requiring an existing low-privileged foothold (AV:L, PR:L), no user interaction, low complexity, yielding full SYSTEM-level C/I/A impact within unchanged scope.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jul 14, 2026 - 20:27 vuln.today

CVE Published

Jul 14, 2026 - 17:07 nvd

HIGH 7.8

DescriptionCVE.org

Use after free in Windows Media allows an authorized attacker to elevate privileges locally.

AnalysisAI

Local privilege escalation in Microsoft Windows Media (the Windows Media component/codec subsystem) allows an already-authenticated local attacker to elevate to SYSTEM by triggering a use-after-free (CWE-416) memory corruption condition. The flaw affects a broad range of currently-supported Windows client and server releases, from Windows 10 1607 and Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. Microsoft has released a patch; there is no public exploit identified at time of analysis and the issue is not listed in CISA KEV.

Technical ContextAI

The vulnerability resides in Windows Media, the multimedia handling subsystem within Windows responsible for parsing and playing media content through codecs and the Media Foundation/legacy media stack. The root cause is a use-after-free (CWE-416): the code continues to reference a heap object after it has been freed, so an attacker who can control the timing and contents of the reallocated memory can corrupt the freed object and coerce the media component into executing attacker-influenced logic in a privileged context. Because the CPE set spans Windows 10 (1607 through 22H2), Windows 11 (24H2, 25H2, 26H1), and Windows Server 2012 through 2025, the defect is in shared, long-lived media platform code rather than a single edition-specific feature.

RemediationAI

Apply the Microsoft security update for CVE-2026-50433 (Patch available per vendor advisory) to all affected Windows 10, Windows 11, and Windows Server systems, including Server Core installations; consult https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50433 for the exact KB article and fixed build for each edition, as this is the definitive fixed-version source. Prioritize multi-user and interactive systems (RDP hosts, terminal servers, shared workstations) where low-privileged users are present, since the flaw requires local access. Because the vulnerability lives in shared media-handling code, no clean feature-level workaround is available short of the patch; interim risk reduction can include restricting untrusted local logon and limiting exposure to untrusted media files/streams, but these are partial and do not neutralize the defect. The most reliable mitigation is installing the vendor patch.