CVE-2026-20869High· 7.0▾ TwilightConcurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · 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
0.3%
0.3% → 0.3%
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.
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_2008windows_server_2008 = r2windows_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 < 10.0.26100.32230Upgrade 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 10.0.26100.32230Connected by shared product, vendor, weakness, or advisory.
CVE-2026-69782High· 8.1Concurrent execution using shared resource with improper synchronization ('race condition') in DNS Server allows an unauthorized attacker to execute code over a network.
CVE-2026-69792Medium· 4.7Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K allows an authorized attacker to bypass a security feature locally.
CVE-2026-20926High· 7.5Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CVE-2026-20921High· 7.5Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CVE-2026-20919High· 7.5Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CVE-2026-20853High· 7.4Concurrent execution using shared resource with improper synchronization ('race condition') in Windows WalletService allows an unauthorized attacker to elevate privileges locally.