cve.bz

Microsoft Patch Tuesday, January 2026: the CVEs

Filter

Microsoft Patch Tuesday January 2026: the CVEs Microsoft published on 13 January 2026, the second Tuesday of the month, with CVSS, EPSS, CISA KEV and public exploits to show what to patch first. Narrow it: in CISA KEV · critical. The same day: Adobe, SAP. Earlier: Dec 2025, Nov 2025, Oct 2025, Sep 2025, Aug 2025, Jul 2025, Jun 2025, May 2025, Apr 2025, Mar 2025, Feb 2025, Jan 2025. Other lists: CISA KEV list, CVE exploit search, Latest critical CVEs, Ransomware CVEs, New CVEs today, This week, Patch Tuesday

  1. 7.5CVE-2026-21226EPSS 0.9%

    Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.

  2. 6.4CVE-2026-21265EPSS 1.1%

    Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificates are approaching expiration, and devices containing affected certificate versions must update them to maintain Secure Boot functionality a…

  3. 7.8CVE-2026-21224EPSS 0.3%

    Stack-based buffer overflow in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.

  4. 7.0CVE-2026-21221EPSS 0.2%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.

  5. 7.0CVE-2026-21219EPSS 0.4%

    Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.

  6. 7.5CVE-2026-20965EPSS 0.2%

    Improper verification of cryptographic signature in Windows Admin Center allows an authorized attacker to elevate privileges locally.

  7. 9.8CVE-2026-20963KEVEPSS 29%

    Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

  8. 4.4CVE-2026-20962EPSS 0.4%

    Use of uninitialized resource in Dynamic Root of Trust for Measurement (DRTM) allows an authorized attacker to disclose information locally.

  9. 5.4CVE-2026-20959EPSS 7.7%

    Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

  10. 5.4CVE-2026-20958EPSS 0.3%

    Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.

  11. 7.8CVE-2026-20957EPSS 0.5%

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

  12. 7.8CVE-2026-20956EPSS 0.4%

    Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  13. 7.8CVE-2026-20955EPSS 0.6%

    Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  14. 8.4CVE-2026-20953EPSS 0.6%

    Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

  15. 8.4CVE-2026-20952EPSS 0.5%

    Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

  16. 7.8CVE-2026-20951EPSS 0.8%

    Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally.

  17. 7.8CVE-2026-20950EPSS 0.5%

    Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  18. 7.8CVE-2026-20949EPSS 0.5%

    Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

  19. 7.8CVE-2026-20948EPSS 0.6%

    Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.

  20. 8.8CVE-2026-20947EPSS 18%

    Improper neutralization of special elements used in an sql command ('sql injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

  21. 7.8CVE-2026-20946EPSS 0.7%

    Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

  22. 8.4CVE-2026-20944EPSS 0.5%

    Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code locally.

  23. 7.0CVE-2026-20943EPSS 0.6%

    Untrusted search path in Microsoft Office allows an unauthorized attacker to execute code locally.

  24. 7.8CVE-2026-20941EPSS 0.5%

    Improper link resolution before file access ('link following') in Host Process for Windows Tasks allows an authorized attacker to elevate privileges locally.

  25. 7.8CVE-2026-20940EPSS 0.5%

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

  26. 5.5CVE-2026-20939EPSS 0.5%

    Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

  27. 7.8CVE-2026-20938EPSS 0.5%

    Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

  28. 5.5CVE-2026-20937EPSS 0.5%

    Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

  29. 4.3CVE-2026-20936EPSS 0.5%

    Out-of-bounds read in Windows NDIS allows an authorized attacker to disclose information with a physical attack.

  30. 6.2CVE-2026-20935EPSS 0.4%

    Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an unauthorized attacker to disclose information locally.

  31. 7.5CVE-2026-20934EPSS 0.7%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

  32. 5.5CVE-2026-20932EPSS 0.7%

    Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

  33. 8.0CVE-2026-20931EPSS 0.8%

    External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

  34. 7.5CVE-2026-20929ExploitEPSS 2.9%

    Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.

  35. 5.3CVE-2026-20927EPSS 0.9%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to deny service over a network.

  36. 7.5CVE-2026-20926EPSS 0.8%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

  37. 6.5CVE-2026-20925EPSS 18%

    External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

  38. 7.8CVE-2026-20924EPSS 0.3%

    Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

  39. 7.8CVE-2026-20923EPSS 0.4%

    Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

  40. 7.8CVE-2026-20922EPSS 1.1%

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

  41. 7.5CVE-2026-20921EPSS 1.2%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

  42. 7.8CVE-2026-20920EPSS 0.5%

    Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

  43. 7.5CVE-2026-20919EPSS 0.8%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

  44. 7.8CVE-2026-20918EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

  45. 7.8CVE-2026-20877EPSS 0.3%

    Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

  46. 6.7CVE-2026-20876EPSS 0.5%

    Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

  47. 7.5CVE-2026-20875EPSS 1.5%

    Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

  48. 7.8CVE-2026-20874EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

  49. 7.8CVE-2026-20873EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

  50. 6.5CVE-2026-20872EPSS 20%

    External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

  51. 7.8CVE-2026-20871EPSS 4.1%

    Use after free in Desktop Windows Manager allows an authorized attacker to elevate privileges locally.

  52. 7.8CVE-2026-20870EPSS 0.5%

    Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

  53. 7.0CVE-2026-20869EPSS 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.

  54. 8.8CVE-2026-20868EPSS 1.4%

    Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

  55. 7.8CVE-2026-20867EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

  56. 7.8CVE-2026-20866EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

  57. 7.8CVE-2026-20865EPSS 0.4%

    Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

  58. 7.8CVE-2026-20864EPSS 0.6%

    Heap-based buffer overflow in Connected Devices Platform Service (Cdpsvc) allows an authorized attacker to elevate privileges locally.

  59. 7.0CVE-2026-20863EPSS 0.4%

    Double free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

  60. 5.5CVE-2026-20862EPSS 0.6%

    Exposure of sensitive information to an unauthorized actor in Windows Management Services allows an authorized attacker to disclose information locally.

  61. 7.8CVE-2026-20861EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

  62. 7.8CVE-2026-20860EPSS 8.3%

    Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

  63. 7.8CVE-2026-20859EPSS 0.5%

    Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

  64. 7.8CVE-2026-20858EPSS 0.3%

    Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

  65. 7.8CVE-2026-20857EPSS 0.5%

    Untrusted pointer dereference in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

  66. 8.1CVE-2026-20856EPSS 1.1%

    Improper input validation in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

  67. 7.5CVE-2026-20854EPSS 1.1%

    Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.

  68. 7.4CVE-2026-20853EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows WalletService allows an unauthorized attacker to elevate privileges locally.

  69. 7.7CVE-2026-20852EPSS 0.5%

    Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

  70. 6.2CVE-2026-20851EPSS 0.6%

    Out-of-bounds read in Capability Access Management Service (camsvc) allows an unauthorized attacker to disclose information locally.

  71. 7.5CVE-2026-20849EPSS 1.0%

    Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network.

  72. 7.5CVE-2026-20848EPSS 0.7%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

  73. 6.5CVE-2026-20847EPSS 1.3%

    Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network.

  74. 7.4CVE-2026-20844EPSS 0.3%

    Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges locally.

  75. 7.8CVE-2026-20843EPSS 3.4%

    Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

  76. 7.0CVE-2026-20842EPSS 0.4%

    Use after free in Windows DWM allows an authorized attacker to elevate privileges locally.

  77. 7.8CVE-2026-20840EPSS 4.6%

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

  78. 5.5CVE-2026-20839EPSS 0.5%

    Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose information locally.

  79. 5.5CVE-2026-20838EPSS 0.7%

    Generation of error message containing sensitive information in Windows Kernel allows an authorized attacker to disclose information locally.

  80. 7.8CVE-2026-20837EPSS 0.7%

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

  81. 7.0CVE-2026-20836EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Graphics Kernel allows an authorized attacker to elevate privileges locally.

  82. 5.5CVE-2026-20835EPSS 0.6%

    Out-of-bounds read in Capability Access Management Service (camsvc) allows an authorized attacker to disclose information locally.

  83. 4.6CVE-2026-20834EPSS 0.7%

    Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack.

  84. 5.5CVE-2026-20833EPSS 0.5%

    Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.

  85. 7.8CVE-2026-20832EPSS 0.5%

    Windows Remote Procedure Call Interface Definition Language (IDL) Elevation of Privilege Vulnerability

  86. 7.0CVE-2026-20831EPSS 0.3%

    Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

  87. 7.0CVE-2026-20830EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.

  88. 5.5CVE-2026-20829EPSS 0.6%

    Out-of-bounds read in Windows TPM allows an authorized attacker to disclose information locally.

  89. 4.6CVE-2026-20828EPSS 0.6%

    Out-of-bounds read in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to disclose information with a physical attack.

  90. 5.5CVE-2026-20827EPSS 0.7%

    Exposure of sensitive information to an unauthorized actor in Tablet Windows User Interface (TWINUI) Subsystem allows an authorized attacker to disclose information locally.

  91. 7.0CVE-2026-20826EPSS 0.3%

    Concurrent execution using shared resource with improper synchronization ('race condition') in Tablet Windows User Interface (TWINUI) Subsystem allows an authorized attacker to elevate privileges locally.

  92. 4.4CVE-2026-20825EPSS 0.5%

    Improper access control in Windows Hyper-V allows an authorized attacker to disclose information locally.

  93. 5.5CVE-2026-20824EPSS 0.9%

    Protection mechanism failure in Windows Remote Assistance allows an unauthorized attacker to bypass a security feature locally.

  94. 5.5CVE-2026-20823EPSS 0.7%

    Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

  95. 7.8CVE-2026-20822EPSS 0.4%

    Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

  96. 6.2CVE-2026-20821EPSS 0.7%

    Exposure of sensitive information to an unauthorized actor in Windows Remote Procedure Call allows an unauthorized attacker to disclose information locally.

  97. 7.8CVE-2026-20820EPSS 2.6%

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

  98. 5.5CVE-2026-20819EPSS 0.5%

    Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.

  99. 6.2CVE-2026-20818EPSS 0.7%

    Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.

  100. 7.8CVE-2026-20817EPSS 5.4%

    Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.