CVE-2026-21219

highpriority · track · 0EPSS 0.004 · 32 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.38% (32nd) EPSS

CVSS 7 · high

Is it mine?

7 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWindows SDKmsrc_csaf
10.0.26100.7463:Security Update:https://learn.microsoft.com/en-us/windows/apps/windows-sdk/release-notes
https://learn.microsoft.com/en-us/windows/apps/windows-sdk/release-notes

cvss

Technical severity, 0–10. One row per scoring source.

7.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–7

v3.17highAV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17highCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17highCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1 · impact 5.9

v3.16.4mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17highCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · NCSC-NL NL

v3.17highCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USCWE-416USCWE-416USCWE-416US

affected products (7)

Products and version ranges known to be affected.

Microsoft Windows SDKall versionscert_bundDEcpe:/o:microsoft:windows:sdk
Microsoft Windows SDK26100 → 10.0.26100.7463enisa_euvdEU
Microsoft Corp Windows SDK≤ 10.0.26100.7463fstec_bduRU
Microsoft Windows SDKall versionsfixedmsrc_csafUS
Microsoft Windows SDK< 10.0.26100.7463msrc_csafUS
Microsoft Windows SDK≤ vers:unknown/*ncsc_nlNL
microsoft windows software development kit10.0.26100 → 10.0.26100.7463nvdUScpe:2.3:a:microsoft:windows_software_development_kit:*:*:*:*:*:*:*:*

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0011Kwetsbaarheid verholpen in Microsoft Developer ToolsNL2026-01-13csaf · ncsc_nlNL
Microsoft heeft een kwetsbaarheid verholpen in Inbox COM Objects.
WID-SEC-W-2026-0082Microsoft Windows SDK: Schwachstelle ermöglicht CodeausführungDeutsch2026-01-13csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle im Microsoft Windows SDK ausnutzen, um beliebigen Programmcode auszuführen.
msrc_CVE-2026-21219Inbox COM Objects (Global Memory) Remote Code Execution Vulnerability2026-01-13csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf ncsc_nl nvd NVD CVE.org MITRE

published 2026-01-13modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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