CVE-2026-78455

EUVD-2026-73806
Out-of-bounds read in Xbox allows an unauthorized attacker to disclose information with a physical attack.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
PHYSICAL
LOW
NONE
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 43.55%
Affected Products (NVD)
VendorProductVersion
microsoftwindows_10_1607
𝑥
< 10.0.14393.9512
microsoftwindows_10_1809
𝑥
< 10.0.17763.9245
microsoftwindows_10_21h2
𝑥
< 10.0.19044.7725
microsoftwindows_10_22h2
𝑥
< 10.0.19045.7725
microsoftwindows_11_23h2
𝑥
< 10.0.22631.7582
microsoftwindows_11_24h2
𝑥
< 10.0.26100.9445
microsoftwindows_11_25h2
𝑥
< 10.0.26200.9445
microsoftwindows_11_26h1
𝑥
< 10.0.28000.2954
microsoftwindows_server_2016
𝑥
< 10.0.14393.9512
microsoftwindows_server_2019
𝑥
< 10.0.17763.9245
𝑥
= Vulnerable software versions
Windows Releases
Platform
Version
Windows 10
1607 (x64, x86)
KB5123099
1809 (x64, x86)
KB5122876
21H2 (arm64, x64, x86)
KB5122878
22H2 (arm64, x64, x86)
KB5122878
Windows 11
23H2 (arm64, x64)
KB5122880
24H2 (arm64, x64)
KB5124008
25H2 (arm64, x64)
KB5124008
26H1 (arm64, x64)
KB5124012
Windows Server 2016
Server Core
KB5123099
Standard
KB5123099
Windows Server 2019
Server Core
KB5122876
Standard
KB5122876
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78455