Source: Microsoft · Limited verification•Last verified: •Collection Running
CVE-2026-56174Unknown / EvaluatingImportant (raw)CVSS 7.8
Windows Narrator Braille Elevation of Privilege Vulnerability
Published: 11 Aug 2026•Last updated: 11 Aug 2026, 12:30 PM IST•Source identifier: Unknown
Dossier completeness: source-provided sections 3 / 3 · rule guidance available. Missing source facts count as incomplete.
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.8Important (raw)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Metric sourceMicrosoft MSRC CVRF
EPSS probability
0.5%0.005
Percentile38th
Weakness type
—
No further CWE recorded
Remediation
Patch status unknown
KB5120238, KB5120242, KB5120229, KB5120249, KB5120233, KB5120228, KB5120240
Why It Matters
Analysis dossierWhy It Matters
Untrusted search path in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.
SOC priority
Medium
Actively exploited
No
Publicly disclosed
Unknown
Risk basis: No confirmed exploitation signal in current enrichment
Affected Products & Remediation
16 source-backed productsAffected products and versions (source)
- Windows 10 Version 1809 for 32-bit Systems · version range not provided by source · Microsoft MSRC · Source
- Windows 10 Version 1809 for x64-based Systems · version range not provided by source · Microsoft MSRC · Source
- Windows Server 2019 · version range not provided by source · Microsoft MSRC · Source
- Windows Server 2019 (Server Core installation) · version range not provided by source · Microsoft MSRC · Source
- Windows Server 2022 · version range not provided by source · Microsoft MSRC · Source
- Windows Server 2022 (Server Core installation) · version range not provided by source · Microsoft MSRC · Source
- Windows 10 Version 21H2 for 32-bit Systems · version range not provided by source · Microsoft MSRC · Source
- Windows 10 Version 21H2 for ARM64-based Systems · version range not provided by source · Microsoft MSRC · Source
- Windows 10 Version 21H2 for x64-based Systems · version range not provided by source · Microsoft MSRC · Source
- Windows 10 Version 22H2 for x64-based Systems · version range not provided by source · Microsoft MSRC · Source
- Windows 10 Version 22H2 for ARM64-based Systems · version range not provided by source · Microsoft MSRC · Source
- Windows 10 Version 22H2 for 32-bit Systems · version range not provided by source · Microsoft MSRC · Source
- Windows Server 2025 (Server Core installation) · version range not provided by source · Microsoft MSRC · Source
- Windows 11 Version 23H2 for ARM64-based Systems · version range not provided by source · Microsoft MSRC · Source
- Windows 11 Version 23H2 for x64-based Systems · version range not provided by source · Microsoft MSRC · Source
- Windows Server 2025 · version range not provided by source · Microsoft MSRC · Source
Recorded patch / KBKB5120238, KB5120242, KB5120229, KB5120249, KB5120233, KB5120228, KB5120240
Vendor or catalog guidance (source)
- Microsoft MSRC: Install the security update KB5120238 listed by MSRC
- Microsoft MSRC: Install the security update KB5120242 listed by MSRC
- Microsoft MSRC: Install the security update KB5120229 listed by MSRC
- Microsoft MSRC: Install the security update KB5120249 listed by MSRC
- Microsoft MSRC: Install the security update KB5120233 listed by MSRC
Known exploitation (source facts)
Only what a source states. Unknown means no source has said either way; it is not "not exploited".
- CISA KEV
- Unknown
- Exploited (source statement)
- No
- Publicly disclosed (source)
- Unknown
Suggested hunting (rule-based inference)
SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.
Matched microsoft-enterprise (Affected product: Windows 10 Version 1809 for 32-bit Systems, Vendor: Microsoft); local-privilege-escalation (CVSS AV:L, CVSS PR:L)
Exposure
- Identify affected Microsoft products and compare local builds with the MSRC advisory.Telemetry: DeviceTvmSoftwareVulnerabilities · The MSRC product/build mapping establishes applicability. · Rule microsoft-enterprise
- Identify hosts reporting this CVE, prioritising shared or multi-user systems.Telemetry: DeviceTvmSoftwareVulnerabilities · A local, low-privilege vector matters most where untrusted users can run code. · Rule local-privilege-escalation
Exploitation evidence
- Review the advisory's documented behavior on matching hosts before selecting a hunt.Telemetry: DeviceProcessEvents · Product family alone does not justify a CVE-specific detection. · Rule microsoft-enterprise
Show more (2)
Exploitation evidence
- Look for low-privileged processes spawning SYSTEM or root-level child processes on affected hosts.Telemetry: DeviceProcessEvents · Hunting hypothesis from the CVSS vector; privilege transitions are a focused starting point, not evidence of attack. · Rule local-privilege-escalation
Response
- Confirm the source-stated KB or mitigation on matching assets.Telemetry: DeviceTvmSoftwareVulnerabilities · A post-update inventory check verifies remediation. · Rule microsoft-enterprise
CISA KEV Record
CISA KEV status was not determined for this record.
Change History & Source Data
— No recorded material change
- CNA / source
- Unknown
- Record status · verification
- UPDATED · Unknown
- CPE
- Unknown
Evidence & Provenance
Detection Hunting Query
— No published hunting query names this record. Browse community and library queries instead.
Correlated briefings
SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.