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TI-2021-09578 Aliases CVE-2021-28465GHSA-v7rp-5m26-pxg5

Web Media Extensions Remote Code Execution Vulnerability

Priority MEDIUM 42CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Web Media Extensions Remote Code Execution Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03663 89th percentileScored 2026-11-07
Fix Fixed Web Media Extensions (Microsoft): 1.0.40831.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWeb Media Extensions1.0.0.0 to before 1.0.40831.01.0.40831.0Patch availableCNA
  • Web Media Extensions VendorMicrosoft Affected 1.0.0.0 to before 1.0.40831.0 Fixed in 1.0.40831.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:web_media_extensions:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
  • cpe:2.3:a:microsoft:web_media_extensions:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

  • Fix · CNA Web Media Extensions (Microsoft) Fixed in 1.0.40831.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-28465
  2. 2026-10-03 Alias added: GHSA-v7rp-5m26-pxg5

References

Patch 1

Advisory 2

  • TI-2026-56165 Web Media Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences