Cyber Resilience

CVE-2026-26155

Medium

Published: 14 April 2026

Published
14 April 2026
Modified
24 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0011 28.4th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-26155 is a medium-severity Buffer Over-read (CWE-126) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique LSASS Memory (T1003.001); ranked at the 28.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Microsoft Local Security Authority Subsystem Service Information Disclosure Vulnerability

CWE(s)
CWE-126

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1003.001 LSASS Memory Credential Access
Adversaries may attempt to access credential material stored in the process memory of the Local Security Authority Subsystem Service (LSASS).
attack.mitre.org →
Why these techniques?

LSASS-specific information disclosure (buffer over-read) directly enables credential dumping from LSASS memory.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

Affected Assets

microsoft
windows 10 1607
≤ 10.0.14393.9060 · ≤ 10.0.14393.9060
microsoft
windows 10 1809
≤ 10.0.17763.8644 · ≤ 10.0.17763.8644
microsoft
windows 10 21h2
≤ 10.0.19044.7184 · ≤ 10.0.19044.7184 · ≤ 10.0.19044.7184
microsoft
windows 10 22h2
≤ 10.0.19045.7184 · ≤ 10.0.19045.7184 · ≤ 10.0.19045.7184
microsoft
windows 11 23h2
≤ 10.0.22631.6936 · ≤ 10.0.22631.6936
microsoft
windows 11 24h2
≤ 10.0.26100.8246 · ≤ 10.0.26100.8246
microsoft
windows 11 25h2
≤ 10.0.26200.8246 · ≤ 10.0.26200.8246
microsoft
windows 11 26h1
≤ 10.0.28000.1836 · ≤ 10.0.28000.1836
microsoft
windows server 2016
≤ 10.0.14393.9060
microsoft
windows server 2019
≤ 10.0.17763.8644
+3 more product configuration(s) — see NVD for full list

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References