CVE-2026-20848High· 7.5▾ TwilightConcurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Jul 31.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.7%
0.7% → 0.8%
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
windows_10_1607 < 10.0.14393.8783windows_10_1809 < 10.0.17763.8276windows_10_21h2 < 10.0.19044.6809windows_10_22h2 < 10.0.19045.6809windows_11_23h2 < 10.0.22631.6491windows_11_24h2 < 10.0.26100.7623windows_11_25h2 < 10.0.26200.7623windows_server_2012windows_server_2012 = r2windows_server_2016 < 10.0.14393.8783windows_server_2019 < 10.0.17763.8276windows_server_2022 < 10.0.20348.4648windows_server_2022_23h2 < 10.0.25398.2092windows_server_2025 < 10.0.26100.7623Upgrade past the affected range:
windows_10_1607 10.0.14393.8783windows_10_1809 10.0.17763.8276windows_10_21h2 10.0.19044.6809windows_10_22h2 10.0.19045.6809windows_11_23h2 10.0.22631.6491windows_11_24h2 10.0.26100.7623windows_11_25h2 10.0.26200.7623windows_server_2016 10.0.14393.8783windows_server_2019 10.0.17763.8276windows_server_2022 10.0.20348.4648windows_server_2022_23h2 10.0.25398.2092windows_server_2025 10.0.26100.7623Connected by shared product, vendor, weakness, or advisory.
CVE-2025-64661High· 7.8Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.
CVE-2026-26167High· 8.8Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
CVE-2026-27921High· 7.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
CVE-2026-32082High· 7.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SSDP Service allows an authorized attacker to elevate privileges locally.
CVE-2026-26173High· 7.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-27911High· 7.8Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.