Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local authenticated user (AV:L/PR:L) triggers a low-complexity injection needing no interaction, yielding full SYSTEM-level compromise, so C/I/A all High.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Improper neutralization of special elements used in a command ('command injection') in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft Windows Narrator (the built-in screen reader) arises from improper neutralization of special elements in its Braille support component, allowing an already-authenticated local attacker (PR:L) to inject and execute OS commands that run with elevated privileges. All supported Windows client and server builds from Windows 10 1809 through Windows 11 26H1 and Windows Server 2019-2025 are affected, and Microsoft has released a patch. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local, authenticated access to the machine with an existing low-privilege account (CVSS PR:L, AV:L) and the ability to invoke the Windows Narrator Braille feature that carries the command-injection flaw; no user interaction by a victim is needed (UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 7.8 HIGH) describes a reliable, low-complexity local escalation requiring only existing low-level privileges and no user interaction, with full confidentiality, integrity, and availability impact on the host. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who already holds a low-privileged local account - for example a standard user on a shared workstation or an RDP session on a terminal server - invokes Narrator's Braille functionality and supplies crafted input containing shell metacharacters that are not neutralized. The injected command executes with elevated privileges, giving the attacker SYSTEM-level control to install tools, read protected data, or disable defenses. … |
| Remediation | Apply the Microsoft security update for CVE-2026-58635 - Patch available per vendor advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58635); the exact fixed build number is not specified in the provided data and should be taken from that advisory for each affected OS version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running Windows 10 1809 through Windows 11 26H1 or Windows Server 2019-2025 with Narrator enabled and assess which support local user access or shared usage patterns. …
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Same weakness CWE-77 – Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-43776
GHSA-ccg6-g66f-f9mv