CVE-2026-21219
Inbox COM Objects (Global Memory) Remote Code Execution Vulnerability
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Inbox COM Objects (Global Memory) Remote Code Execution Vulnerability
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
- Record
CVE-2026-21219- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2026-2102
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
- Record
EUVD-2026-2102- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-wvh3-vgpw-w4mr
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
- Record
GHSA-wvh3-vgpw-w4mr- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
- Record
CVE-2026-21219- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- 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-2026-21219 is a high vulnerability (CVSS 7.0) in Microsoft Windows Sdk, published January 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. No source names a fixed version.