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Fencer Vulns
high 7.0

CVE-2025-27478 json

Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability

published 2025-04-08 19 mo ago modified 2026-08-10 2 mo ago also EUVD-2025-10167

cvss
7.0
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

Summary

Heap-based buffer overflow in Windows Local Security Authority (LSA) allows an authorized attacker to elevate privileges locally.

Patch / fix

  • Microsoft Windows 10 Version 1507 10.0.10240.20978
  • Microsoft Windows 10 Version 1607 10.0.14393.7969
  • Microsoft Windows 10 Version 1809 10.0.17763.7136
  • Microsoft Windows 10 Version 21H2 10.0.19044.5737
  • Microsoft Windows 10 Version 22H2 10.0.19045.5737
  • Microsoft Windows 11 version 22H2 10.0.22621.5189
  • Microsoft Windows 11 version 22H3 10.0.22631.5189
  • Microsoft Windows 11 Version 23H2 10.0.22631.5189
  • Microsoft Windows 11 Version 24H2 10.0.26100.3775
  • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.27670
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.27670
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.23220
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.23220
  • Microsoft Windows Server 2012 6.2.9200.25423
  • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.25423
  • Microsoft Windows Server 2012 R2 6.3.9600.22523
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.22523
  • Microsoft Windows Server 2016 10.0.14393.7969
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.7969
  • Microsoft Windows Server 2019 10.0.17763.7136
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.7136
  • Microsoft Windows Server 2022 10.0.20348.3453
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1551
  • Microsoft Windows Server 2025 10.0.26100.3775
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.3775

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
19 mo ago

Exploit prediction

0.46% 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 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows 10 Version 1507
  • Microsoft Windows 10 Version 1607
  • Microsoft Windows 10 Version 1809
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 22H2
  • Microsoft Windows 11 version 22H2
  • Microsoft Windows 11 version 22H3
  • Microsoft Windows 11 Version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows Server 2008 R2 Service Pack 1
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
  • Microsoft Windows Server 2008 Service Pack 2
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 (Server Core installation)
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

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.