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TI-2021-19250 Aliases CVE-2021-43243GHSA-vxh6-3w55-j34c

VP9 Video Extensions Information Disclosure Vulnerability

Priority LOW 26Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

VP9 Video Extensions Information Disclosure Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00788 56th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftVP9 Video ExtensionsN/A—No fix listedCNA
  • VP9 Video Extensions VendorMicrosoft Affected N/A Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:vp9_video_extensions:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
  • cpe:2.3:a:microsoft:vp9_video_extensions:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43243
  2. 2026-10-03 Alias added: GHSA-vxh6-3w55-j34c

References

Patch 1

  • TI-2021-11954 VP9 Video Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2022-08368 VP9 Video Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2022-08321 VP9 Video Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2022-06960 VP9 Video Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2021-09577 VP9 Video Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2023-18660 VP9 Video Extensions Information Disclosure Vulnerability CVSS 3.1MEDIUM 5.5

Sources

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