CVE-2026-42904
Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges over an adjacent network.
CSIRTS triage
- What
- Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges over an adjacent network.
- Who is affected
- Users of Windows TCP/IP on adjacent networks.
- Urgency
- Immediate action is required due to the critical severity and potential for exploitation.
- Action
- Install the security update from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalCVE-2026-42904: Windows TCP/IP Elevation of Privilege Vulnerabilitymsrc · 2026-06-09
External references
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