CVE-2026-58635

HIGH

Microsoft Windows 10 Version 1809 - Windows Narrator Braille Elevation of Privilege Vulnerability

Title source: rule
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-58635. PoCs published by DavidCarliez.

AI-analyzed exploit summary This PoC exploits a local privilege escalation vulnerability (CVE-2026-58635) in Windows Narrator's Braille (BRLTTY) component by abusing the `brlapi_setParameter` function to execute arbitrary payloads as LocalService, then leveraging SigmaPotato for token impersonation to achieve SYSTEM privileges.

Description

Improper neutralization of special elements used in a command ('command injection') in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.

Exploits (1)

github WORKING POC
by DavidCarliez · c++poc
https://github.com/DavidCarliez/CVE-2026-58635-PoC

This PoC exploits a local privilege escalation vulnerability (CVE-2026-58635) in Windows Narrator's Braille (BRLTTY) component by abusing the `brlapi_setParameter` function to execute arbitrary payloads as LocalService, then leveraging SigmaPotato for token impersonation to achieve SYSTEM privileges.

Classification
Working Poc 98%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Windows Narrator Braille (BRLTTY 6.4.1 on Windows 10/11 and Server 2019/2022, prior to July 2026 patch)
Auth required
Prerequisites: Braille capability installed (Accessibility.Braille*) · BRLTTY service running as LocalService · Standard user privileges · Vulnerable Windows build (pre-July 2026 patch)
mistral-large-3 · analyzed Jul 15, 2026 Full analysis →

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows Narrator Braille Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58635

Scores

CVSS v3 7.8
EPSS 0.0039
EPSS Percentile 31.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-77
Status published
Products (22)
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.9020
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.7548
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7548
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8875
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26100.8875
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8875
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2525
Microsoft/Windows Server 2019 10.0.17763.0 - 10.0.17763.9020
Microsoft/Windows Server 2019 (Server Core installation) 10.0.17763.0 - 10.0.17763.9020
Microsoft/Windows Server 2022 10.0.20348.0 - 10.0.20348.5386
... and 12 more
Published Jul 14, 2026
Tracked Since Jul 14, 2026