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CWE-122: Heap-based Buffer Overflow, page 22

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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-2026-63518EPSS 0.5%

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

  2. 7.8CVE-2026-63513EPSS 0.5%

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

  3. 8.8CVE-2026-62913EPSS 0.9%

    Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.

  4. 7.8CVE-2026-62894EPSS 0.3%

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

  5. 7.8CVE-2026-62890EPSS 0.3%

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

  6. 7.8CVE-2026-62886EPSS 0.5%

    Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.

  7. 7.8CVE-2026-62885EPSS 0.3%

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

  8. 6.7CVE-2026-62883EPSS 0.3%

    Numeric truncation error in Windows DNS allows an authorized attacker to elevate privileges locally.

  9. 6.7CVE-2026-62881EPSS 0.3%

    Numeric truncation error in Windows DNS allows an authorized attacker to elevate privileges locally.

  10. 7.8CVE-2026-62871EPSS 0.5%

    Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.

  11. 8.8CVE-2026-62823EPSS 0.5%

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

  12. 8.8CVE-2026-62822EPSS 0.8%

    Integer overflow or wraparound in Windows GDI+ allows an unauthorized attacker to execute code over a network.

  13. 8.8CVE-2026-62816EPSS 0.5%

    Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.

  14. 7.8CVE-2026-62811EPSS 0.3%

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

  15. 8.8CVE-2026-62800EPSS 0.9%

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

  16. 7.8CVE-2026-62799EPSS 0.3%

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

  17. 7.8CVE-2026-62797EPSS 0.3%

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

  18. 8.8CVE-2026-62790EPSS 0.9%

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

  19. 8.8CVE-2026-62785EPSS 0.8%

    Heap-based buffer overflow in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to execute code over a network.

  20. 8.8CVE-2026-62784EPSS 0.9%

    Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to execute code over a network.

  21. 7.8CVE-2026-62783EPSS 0.3%

    Heap-based buffer overflow in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

  22. 8.1CVE-2026-62781EPSS 0.7%

    Heap-based buffer overflow in RPC Runtime allows an unauthorized attacker to execute code over a network.

  23. 7.8CVE-2026-62772EPSS 0.3%

    Heap-based buffer overflow in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

  24. 7.8CVE-2026-62771EPSS 0.3%

    Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

  25. 7.8CVE-2026-62770EPSS 0.3%

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

  26. 6.7CVE-2026-62769EPSS 0.3%

    Numeric truncation error in Windows DNS allows an authorized attacker to elevate privileges locally.

  27. 7.8CVE-2026-62758EPSS 0.3%

    Heap-based buffer overflow in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

  28. 7.8CVE-2026-62754EPSS 0.3%

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

  29. 7.0CVE-2026-62753EPSS 0.3%

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

  30. 7.8CVE-2026-62752EPSS 0.3%

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

  31. 7.8CVE-2026-62747EPSS 0.3%

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

  32. 7.8CVE-2026-62741EPSS 0.3%

    Integer underflow (wrap or wraparound) in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

  33. 7.8CVE-2026-62739EPSS 0.3%

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

  34. 7.8CVE-2026-62736EPSS 0.3%

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

  35. 7.8CVE-2026-62735EPSS 0.3%

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

  36. 7.8CVE-2026-62732EPSS 0.3%

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

  37. 7.8CVE-2026-62722EPSS 0.3%

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

  38. 7.8CVE-2026-62719EPSS 0.3%

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

  39. 7.8CVE-2026-62717EPSS 0.3%

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

  40. 7.8CVE-2026-62713EPSS 0.3%

    Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

  41. 7.8CVE-2026-62712EPSS 0.3%

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

  42. 7.8CVE-2026-62710EPSS 0.3%

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

  43. 7.8CVE-2026-62700EPSS 0.3%

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

  44. 6.8CVE-2026-62699EPSS 0.4%

    Null pointer dereference in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to execute code locally.

  45. 7.8CVE-2026-62695EPSS 0.3%

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

  46. 7.8CVE-2026-62692EPSS 0.3%

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

  47. 7.8CVE-2026-62688EPSS 0.3%

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

  48. 7.8CVE-2026-61937EPSS 0.3%

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

  49. 7.8CVE-2026-61932EPSS 0.3%

    Access of resource using incompatible type ('type confusion') in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

  50. 7.8CVE-2026-61930EPSS 0.3%

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