CVE-2026-88101CWE-1390

CVE-2026-88101

High · published October 13, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
10.1
In the wild
Unconfirmed
What it is

Weak authentication in Microsoft Input Method Editor (IME) allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00206 · 10.1th percentile
Weakness
CWE-1390 · Weak Authentication
Published
2026-10-13T23:21Z
Affected products (26)
ProductVersionsFixed in
microsoft/windows_10_1607< 10.0.14393.961210.0.14393.9612
microsoft/windows_10_1607< 10.0.14393.961210.0.14393.9612
microsoft/windows_10_1809< 10.0.17763.937610.0.17763.9376
microsoft/windows_10_1809< 10.0.17763.937610.0.17763.9376
microsoft/windows_10_21h2< 10.0.19044.780710.0.19044.7807
microsoft/windows_10_21h2< 10.0.19044.780710.0.19044.7807
microsoft/windows_10_21h2< 10.0.19044.780710.0.19044.7807
microsoft/windows_10_22h2< 10.0.19045.780710.0.19045.7807
microsoft/windows_10_22h2< 10.0.19045.780710.0.19045.7807
microsoft/windows_10_22h2< 10.0.19045.780710.0.19045.7807
microsoft/windows_11_23h2< 10.0.22631.765210.0.22631.7652
microsoft/windows_11_23h2< 10.0.22631.765210.0.22631.7652
microsoft/windows_11_24h2< 10.0.26100.971110.0.26100.9711
microsoft/windows_11_24h2< 10.0.26100.971110.0.26100.9711
microsoft/windows_11_25h2< 10.0.26200.971110.0.26200.9711
microsoft/windows_11_25h2< 10.0.26200.971110.0.26200.9711
microsoft/windows_11_26h1< 10.0.28000.323110.0.28000.3231
microsoft/windows_11_26h1< 10.0.28000.323110.0.28000.3231
microsoft/windows_11_26h2< 10.0.26300.971110.0.26300.9711
microsoft/windows_11_26h2< 10.0.26300.971110.0.26300.9711
microsoft/windows_server_2012all versions—
microsoft/windows_server_2012all versions—
microsoft/windows_server_2016< 10.0.14393.961210.0.14393.9612
microsoft/windows_server_2019< 10.0.17763.937610.0.17763.9376
microsoft/windows_server_2022< 10.0.20348.576110.0.20348.5761
microsoft/windows_server_2025< 10.0.26100.3365010.0.26100.33650
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88101 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:35Z
    EPSS moved — → 0%
    epss
  • 13 OCT 19:00Z
    Microsoft Input Method Editor (IME) Elevation of Privilege Vulnerability
    cvelistv5
  • 13 OCT 19:00Z
    Microsoft Input Method Editor (IME) Elevation of Privilege Vulnerability
    cvelistv5