CVE-2021-43243
VP9 Video Extensions Information Disclosure Vulnerability
VP9 Video Extensions Information Disclosure Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
VP9 Video Extensions Information Disclosure Vulnerability
VP9 Video Extensions Information Disclosure Vulnerability
- Record
CVE-2021-43243- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-30187
VP9 Video Extensions Information Disclosure Vulnerability
- Record
EUVD-2021-30187- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-vxh6-3w55-j34c No score
VP9 Video Extensions Information Disclosure Vulnerability
VP9 Video Extensions Information Disclosure Vulnerability
- Record
GHSA-vxh6-3w55-j34c- Updated
- 2026-11-02
NVD
VP9 Video Extensions Information Disclosure Vulnerability
- Record
CVE-2021-43243- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43243 is a medium vulnerability (CVSS 5.5) in Microsoft Vp9 Video Extensions, published December 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.79%, the 56th percentile. No source names a fixed version.