Windows Narrator Braille Elevation of Privilege Vulnerability
Improper neutralization of special elements used in a command ('command injection') in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.
- Published
- Jul 14, 2026
- Updated
- Sep 25, 2026
- EPSS
- 0.3% · 23th percentile
- CWE
- CWE-77
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · microsoft
- 7.8
- NVD has not scored this yet; the score shown is the CNA’s.
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
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | windows 10 1809 | cpe:2.3:o:microsoft:windows_10_1809 |
| microsoft | windows 10 21h2 | cpe:2.3:o:microsoft:windows_10_21h2 |
| microsoft | windows 10 22h2 | cpe:2.3:o:microsoft:windows_10_22h2 |
| microsoft | windows 11 24h2 | cpe:2.3:o:microsoft:windows_11_24h2 |
| microsoft | windows 11 25h2 | cpe:2.3:o:microsoft:windows_11_25h2 |
| microsoft | windows 11 26h1 | cpe:2.3:o:microsoft:windows_11_26h1 |
| microsoft | windows server 2019 | cpe:2.3:o:microsoft:windows_server_2019 |
| microsoft | windows server 2022 | cpe:2.3:o:microsoft:windows_server_2022 |
| microsoft | windows server 2025 | cpe:2.3:o:microsoft:windows_server_2025 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft windows server 2019before 10.0.17763.9020
- microsoft windows server 2022before 10.0.20348.5386
- microsoft windows server 2025before 10.0.26100.33158
Versions reported by the vendor
Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.
Microsoft Windows 10 Version 1809
- 10.0.17763.0 and later · before 10.0.17763.9020affected
Microsoft Windows 10 Version 21H2
- 10.0.19044.0 and later · before 10.0.19044.7548affected
Microsoft Windows 10 Version 22H2
- 10.0.19045.0 and later · before 10.0.19045.7548affected
Microsoft Windows 11 Version 24H2
- 10.0.26100.0 and later · before 10.0.26100.8875affected
Microsoft Windows 11 Version 25H2
- 10.0.26200.0 and later · before 10.0.26200.8875affected
Microsoft Windows 11 version 26H1
- 10.0.28000.0 and later · before 10.0.28000.2525affected
Microsoft Windows Server 2019
- 10.0.17763.0 and later · before 10.0.17763.9020affected
Microsoft Windows Server 2019 (Server Core installation)
- 10.0.17763.0 and later · before 10.0.17763.9020affected
Microsoft Windows Server 2022
- 10.0.20348.0 and later · before 10.0.20348.5386affected
Microsoft Windows Server 2025
- 10.0.26100.0 and later · before 10.0.26100.33158affected
Microsoft Windows Server 2025 (Server Core installation)
- 10.0.26100.0 and later · before 10.0.26100.33158affected
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-21412Internet Shortcut Files Security Feature Bypass VulnerabilityKEV92Now
- CVE-2021-36934Windows Elevation of Privilege VulnerabilityKEV81Now
- CVE-2024-21338Windows Kernel Elevation of Privilege VulnerabilityKEV79This week
- CVE-2022-21882Win32k Elevation of Privilege VulnerabilityKEV79This week
- CVE-2024-29988SmartScreen Prompt Security Feature Bypass VulnerabilityKEV78This week
- CVE-2022-21971Windows Runtime Remote Code Execution VulnerabilityKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Windows 10 Version 1809 for 32-bit Systems | 10.0.17763.9020 · KB5099538 | Microsoft (MSRC) |
| Windows 10 Version 1809 for x64-based Systems | 10.0.17763.9020 · KB5099538 | Microsoft (MSRC) |
| Windows 10 Version 21H2 for 32-bit Systems | 10.0.19044.7548 · KB5099539 | Microsoft (MSRC) |
| Windows 10 Version 21H2 for ARM64-based Systems | 10.0.19044.7548 · KB5099539 | Microsoft (MSRC) |
| Windows 10 Version 21H2 for x64-based Systems | 10.0.19044.7548 · KB5099539 | Microsoft (MSRC) |
| Windows 10 Version 22H2 for 32-bit Systems | 10.0.19045.7548 · KB5099539 | Microsoft (MSRC) |
| Windows 10 Version 22H2 for ARM64-based Systems | 10.0.19045.7548 · KB5099539 | Microsoft (MSRC) |
| Windows 10 Version 22H2 for x64-based Systems | 10.0.19045.7548 · KB5099539 | Microsoft (MSRC) |
| Windows 11 Version 24H2 for ARM64-based Systems | 10.0.26100.8875 · KB5101650 | Microsoft (MSRC) |
| Windows 11 Version 24H2 for x64-based Systems | 10.0.26100.8875 · KB5101650 | Microsoft (MSRC) |
| Windows 11 Version 25H2 for ARM64-based Systems | 10.0.26200.8875 · KB5101650 | Microsoft (MSRC) |
| Windows 11 Version 25H2 for x64-based Systems | 10.0.26200.8875 · KB5101650 | Microsoft (MSRC) |
| Windows 11 Version 26H1 for ARM64-based Systems | 10.0.28000.2525 · KB5101649 | Microsoft (MSRC) |
| Windows 11 version 26H1 for x64-based Systems | 10.0.28000.2525 · KB5101649 | Microsoft (MSRC) |
| Windows Server 2019 | 10.0.17763.9020 · KB5099538 | Microsoft (MSRC) |
| Windows Server 2019 (Server Core installation) | 10.0.17763.9020 · KB5099538 | Microsoft (MSRC) |
| Windows Server 2022 | 10.0.20348.5386 · KB5099540 | Microsoft (MSRC) |
| Windows Server 2025 | 10.0.26100.33158 · KB5099536 | Microsoft (MSRC) |
| Windows Server 2025 (Server Core installation) | 10.0.26100.33158 · KB5099536 | Microsoft (MSRC) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:30 | 2026-07-15 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoCsame day
- TodayOct 1, 2026+78 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
—
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
- CVE-2026-491740 days apartDNS Client Tampering Vulnerability24Monitor
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- LDAP InjectionCAPEC-136likelihood: High · High
- Command DelimitersCAPEC-15likelihood: High · High
- IMAP/SMTP Command InjectionCAPEC-183Medium
- Command InjectionCAPEC-248likelihood: Medium · High
- Manipulating Writeable Terminal DevicesCAPEC-40likelihood: High · Very High
- Exploiting Multiple Input Interpretation LayersCAPEC-43likelihood: Medium · High
- Manipulating Writeable Configuration FilesCAPEC-75likelihood: High · Very High
- Manipulating Web Input to File System CallsCAPEC-76likelihood: High · Very High
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.