Windows Speech Runtime Elevation of Privilege Vulnerability

published 2026-04-14 6 mo ago modified 2026-10-26 14 d ago also EUVD-2026-22538

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits: 0; none known

Use after free in Microsoft Windows Speech allows an authorized attacker to elevate privileges locally.

Patch / fix

fixed in 7 links 1

Microsoft Windows 10 Version 1809 10.0.17763.8644
Microsoft Windows 10 Version 21H2 10.0.19044.7184
Microsoft Windows 10 Version 22H2 10.0.19045.7184
Microsoft Windows 11 version 23H2 10.0.22631.6936
Microsoft Windows 11 Version 24H2 10.0.26100.8246
Microsoft Windows 11 Version 25H2 10.0.26200.8246
Microsoft Windows 11 version 26H1 10.0.28000.1836

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32153 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 6 mo ago (2026-04-15)

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.8	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
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 Version 1809
Microsoft Windows 10 Version 21H2
Microsoft Windows 10 Version 22H2
Microsoft Windows 11 version 23H2
Microsoft Windows 11 Version 24H2
Microsoft Windows 11 Version 25H2
Microsoft Windows 11 version 26H1

Classification

Weakness

CWE-416 Use After Free
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2026-32153
vendor-advisory, patch

Sources

CVE List CVE-2026-32153
NVD CVE-2026-32153

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary