7.5
High
CVE-2026-83855 Integer underflow (wrap or wraparound) in Windows WLAN Service allows an unauthorized attacker to deny service over a…
Description
Integer underflow (wrap or wraparound) in Windows WLAN Service allows an unauthorized attacker to deny service over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 11 Version 23H2 10.0 | 10.0.22631.0 → < 10.0.22631.7652 | 10.0.22631.7652 |
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.9711 | 10.0.26100.9711 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.9711 | 10.0.26200.9711 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.3231 | 10.0.28000.3231 |
| Windows 11 Version 26H2 10.0 | 10.0.26300.0 → < 10.0.26300.9711 | 10.0.26300.9711 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.33650 | 10.0.26100.33650 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.33650 | 10.0.26100.33650 |
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