CVE-2026-42980High· 7.8▾ MidnightPoC availableInteger underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 42.9 · likelihood 1.4 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Jul 29.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
6.9%
1 GitHub repo
Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.
windows_10_1607 < 10.0.14393.9234windows_10_1809 < 10.0.17763.8880windows_10_21h2 < 10.0.19044.7417windows_10_22h2 < 10.0.19045.7417windows_11_23h2 < 10.0.22631.7219windows_11_24h2 < 10.0.26100.8655windows_11_25h2 < 10.0.26200.8655windows_11_26h1 < 10.0.28000.2269windows_server_2012windows_server_2012 = r2windows_server_2016 < 10.0.14393.9234windows_server_2019 < 10.0.17763.8880windows_server_2022 < 10.0.20348.5256windows_server_2025 < 10.0.26100.32995Upgrade past the affected range:
windows_10_1607 10.0.14393.9234windows_10_1809 10.0.17763.8880windows_10_21h2 10.0.19044.7417windows_10_22h2 10.0.19045.7417windows_11_23h2 10.0.22631.7219windows_11_24h2 10.0.26100.8655windows_11_25h2 10.0.26200.8655windows_11_26h1 10.0.28000.2269windows_server_2016 10.0.14393.9234windows_server_2019 10.0.17763.8880windows_server_2022 10.0.20348.5256windows_server_2025 10.0.26100.32995Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-85880High· 7.8Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
CVE-2026-54984High· 7.8Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code locally.
CVE-2026-20820High· 7.8Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
CVE-2026-84000High· 7.8Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to execute code locally.
CVE-2026-83996High· 8.8Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
CVE-2026-83995High· 7.8Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.