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CWE-122: Heap-based Buffer Overflow, page 25

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The product writes past the end of a buffer that was allocated on the heap.

What the weakness is: CWE-122 at MITRE

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Show the promptExplain CWE-122: Heap-based Buffer Overflow and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/122.html and https://cve.bz/cve/cwe/122?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.

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  1. 7.8CVE-2026-56650EPSS 0.3%

    Heap-based buffer overflow in Windows Network File System allows an authorized attacker to elevate privileges locally.

  2. 8.8CVE-2026-56194EPSS 0.9%

    Heap-based buffer overflow in Windows Network File System allows an authorized attacker to elevate privileges over a network.

  3. 8.4CVE-2026-56189EPSS 0.4%

    Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code locally.

  4. 7.8CVE-2026-56182EPSS 0.3%

    Integer overflow or wraparound in Windows NTFS allows an authorized attacker to elevate privileges locally.

  5. 7.8CVE-2026-56175EPSS 0.3%

    Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.

  6. 9.8CVE-2026-56159EPSS 1.0%

    Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

  7. 7.8CVE-2026-56156EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  8. 7.8CVE-2026-55947EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  9. 7.8CVE-2026-55140EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

  10. 7.8CVE-2026-55137EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  11. 7.8CVE-2026-55133EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code locally.

  12. 7.8CVE-2026-55131EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  13. 7.8CVE-2026-55130EPSS 0.6%

    Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

  14. 7.8CVE-2026-55129EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

  15. 7.8CVE-2026-55127EPSS 0.6%

    Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

  16. 7.8CVE-2026-55125EPSS 0.6%

    Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

  17. 7.8CVE-2026-55123EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

  18. 7.8CVE-2026-55120EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

  19. 7.8CVE-2026-55056EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

  20. 7.8CVE-2026-55053EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  21. 7.8CVE-2026-55049EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

  22. 7.8CVE-2026-55048EPSS 0.5%

    Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  23. 7.8CVE-2026-55043EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

  24. 7.8CVE-2026-55041EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  25. 7.8CVE-2026-55039EPSS 0.5%

    Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  26. 7.8CVE-2026-55037EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  27. 7.8CVE-2026-55033EPSS 0.6%

    Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to execute code locally.

  28. 7.8CVE-2026-55029EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  29. 7.8CVE-2026-55017EPSS 0.5%

    Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

  30. 9.8CVE-2026-55010EPSS 1.0%

    Heap-based buffer overflow in Minecraft Bedrock Dedicated Server allows an unauthorized attacker to execute code over a network.

  31. 7.8CVE-2026-54124EPSS 0.5%

    Integer overflow or wraparound in Windows Terminal allows an unauthorized attacker to execute code locally.

  32. 7.8CVE-2026-54115EPSS 0.3%

    Integer overflow or wraparound in Windows Active Directory allows an authorized attacker to elevate privileges locally.

  33. 8.8CVE-2026-50692EPSS 0.3%

    Heap-based buffer overflow in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

  34. 8.0CVE-2026-50683EPSS 0.6%

    Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to elevate privileges over an adjacent network.

  35. 7.8CVE-2026-50680EPSS 0.3%

    Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

  36. 7.8CVE-2026-50679EPSS 0.3%

    Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

  37. 7.8CVE-2026-50670EPSS 0.3%

    Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally.

  38. 6.8CVE-2026-50668EPSS 0.4%

    Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to elevate privileges with a physical attack.

  39. 7.8CVE-2026-50655EPSS 0.5%

    Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.

  40. 9.8CVE-2026-50518EPSS 1.0%

    Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

  41. 7.8CVE-2026-50499EPSS 0.3%

    Heap-based buffer overflow in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

  42. 7.8CVE-2026-50494EPSS 0.3%

    Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

  43. 6.8CVE-2026-50492EPSS 0.4%

    Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to execute code with a physical attack.

  44. 7.8CVE-2026-50489EPSS 0.3%

    Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.

  45. 7.8CVE-2026-50484EPSS 0.3%

    Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

  46. 7.8CVE-2026-50482EPSS 0.4%

    Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

  47. 7.8CVE-2026-50480EPSS 0.3%

    Heap-based buffer overflow in Windows Web Proxy Auto-Discovery Protocol (WPAD) allows an authorized attacker to elevate privileges locally.

  48. 7.8CVE-2026-50477EPSS 0.3%

    Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

  49. 7.8CVE-2026-50471EPSS 0.5%

    Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

  50. 7.8CVE-2026-50461EPSS 0.5%

    Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.