EUVD-2026-44257
GHSA-4895-4gj9-m7gc
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Local delivery (AV:L) with required user interaction (UI:R) but no attacker authentication (PR:N); memory-corruption code execution yields full C/I/A impact with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Integer overflow or wraparound in Windows Terminal allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in Microsoft Windows Terminal (shipped on Windows 10 21H2/22H2, Windows 11 24H2/25H2/26H1, and Windows Server 2022/2025) arises from an integer overflow (CWE-190) that an unauthorized attacker can trigger, but only after luring a logged-on user into interacting with malicious content. There is no public exploit identified at time of analysis and the flaw is not in CISA KEV, so this is a defense-in-depth patch rather than an emergency, though the CVSS 7.8 reflects full confidentiality, integrity, and availability impact once triggered. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a logged-on local user to interact with attacker-supplied content that Windows Terminal processes (CVSS UI:R and AV:L) - for example opening a malicious file/profile or rendering crafted terminal output - on a system where Windows Terminal is installed (Windows 10 21H2/22H2, Windows 11 24H2/25H2/26H1, or Windows Server 2022/2025). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, base 7.8) describes a local, low-complexity flaw that requires no privileges (PR:N) but does require user interaction (UI:R), yielding high impact across all three security properties without a scope change. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts malicious content - such as a terminal profile, escape-sequence-laden output, or a file designed to be rendered - and social-engineers a logged-on user into opening or displaying it in Windows Terminal. Processing the content triggers the integer overflow, corrupting memory and executing attacker-controlled code in the victim user's context. … |
| Remediation | Apply the Microsoft-provided update: Patch available per vendor advisory - install the fix referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54124 through Windows Update and, for the Store-distributed Windows Terminal, ensure the app itself is updated to the latest version via the Microsoft Store or winget. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, create an inventory of Windows Terminal deployments across Windows 10 (21H2/22H2), Windows 11 (24H2/25H2/26H1), and Windows Server 2022/2025 and begin testing the patch in a non-production environment. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
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External POC / Exploit Code
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