Inbox COM Objects (Global Memory) Remote Code Execution Vulnerability
Priority LOW 33CWE-416Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- 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 Microsoft.
Summary
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00383 32nd percentileScored 2026-11-07
Fix Fixed Windows SDK (Microsoft): 10.0.26100.7463
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Windows SDK | 26100 to before 10.0.26100.7463 | 10.0.26100.7463 | Patch available | CNA |
- Windows SDK VendorMicrosoft Affected 26100 to before 10.0.26100.7463 Fixed in 10.0.26100.7463 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:windows_software_development_kit:*:*:*:*:*:*:*:* | 10.0.26100 to before 10.0.26100.7463 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:windows_software_development_kit:*:*:*:*:*:*:*:* Versions 10.0.26100 to before 10.0.26100.7463 Vulnerable ·Microsoft
Remediation
- Fix · CNA Windows SDK (Microsoft) Fixed in 10.0.26100.7463
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Remote Code Execution
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Unlikely
| Product | Status | Plan or fix |
|---|---|---|
| Windows SDK | Fixed | 10.0.26100.7463 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-21219
- 2026-10-03 Alias added: GHSA-wvh3-vgpw-w4mr
More Microsoft Windows Software Development Kit vulnerabilities
- TI-2025-30352 Windows SDK Elevation of Privilege Vulnerability CVSS 3.1HIGH 7.8
Sources
- CVE-2026-21219 · CVE Program
- CVE-2026-21219 · NVD
- FIRST EPSS
- GHSA-wvh3-vgpw-w4mr · GitHub Advisory Database · CC BY 4.0
- CVE-2026-21219 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences