Windows Terminal Remote Code Execution Vulnerability

published 2026-07-14 3 mo ago modified 2026-11-01 7 d ago also EUVD-2026-44257

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

Integer overflow or wraparound in Windows Terminal allows an unauthorized attacker to execute code locally.

Patch / fix

fixed in 10 links 1

Microsoft Windows 10 Version 21H2 10.0.19044.7548
Microsoft Windows 10 Version 22H2 10.0.19045.7548
Microsoft Windows 11 Version 24H2 10.0.26100.8875
Microsoft Windows 11 Version 25H2 10.0.26200.8875
Microsoft Windows 11 version 26H1 10.0.28000.2525
Microsoft Windows Server 2022 10.0.20348.5386
Microsoft Windows Server 2025 10.0.26100.33158
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33158
Microsoft Windows Terminal for Windows 10 1.24.11321.0
Microsoft Windows Terminal for Windows 11 1.24.11321.0

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54124 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 3 mo ago (2026-07-15)

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% 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:N/UI:R/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:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 Version 21H2
Microsoft Windows 10 Version 22H2
Microsoft Windows 11 Version 24H2
Microsoft Windows 11 Version 25H2
Microsoft Windows 11 version 26H1
Microsoft Windows Server 2022
Microsoft Windows Server 2025
Microsoft Windows Server 2025 (Server Core installation)
Microsoft Windows Terminal for Windows 10
Microsoft Windows Terminal for Windows 11

Classification

Weakness

CWE-190 Integer Overflow or Wraparound
CWE-122 Heap-based Buffer Overflow

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2026-54124
vendor-advisory, patch

Sources

CVE List CVE-2026-54124
NVD CVE-2026-54124

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