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Recorded 5 Nov 2026 at 23:42 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.

CVEMicrosoft Security Response Center

Xbox Information Disclosure Vulnerability

Out-of-bounds read in Xbox allows an unauthorized attacker to disclose information with a physical attack.

What it said

CVE
CVE-2026-78455
Severity
Important
CVSS base score
4.3
CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Impact
Information Disclosure
Exploitation detected
No known exploitation (MSRC assessment)
Publicly disclosed
No (MSRC assessment)
Exploitability
Exploitation Less Likely
Component
Xbox
Weakness
CWE-125: Out-of-bounds Read
Issued by
Microsoft
Customer action
Required: follow the MSRC remediation guidance
Affected products
Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation)
Updates that fix it
KB5122876: Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation) (restart required); KB5122878: Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems (restart required); KB5122880: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5123099: Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016, Windows Server 2016 (Server Core installation) (restart required); KB5124008: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems (restart required); KB5124012: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required)
CISA KEV
Not listed in the collected catalog
EPSS
0.5%; scored 5 Nov 2026
Public detection template
No Nuclei template listed
Published
8 Sep 2026 07:00 UTC
Last revised
8 Sep 2026 07:00 UTC
Revision note
Information published.
Public exploit code
No Nuclei template listed

Source evidence when recorded

Microsoft security releases
Complete at observationRead 5 Nov 2026 at 23:40 UTC
CISA KEV
Complete at observationRead 5 Nov 2026 at 23:40 UTC
FIRST EPSS
Complete at observationRead 5 Nov 2026 at 23:40 UTC
Public detection templates (Nuclei)
Complete at observationRead 5 Nov 2026 at 23:40 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

What changed

  1. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  3. Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → No (MSRC assessment) · Exploitation detected: Not reported by MSRC → No known exploitation (MSRC assessment)
  4. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  5. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (48)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 5 Nov 2026 · 23:42:03 UTC EPSS0.5%; scored 4 Nov 2026 → 0.5%; scored 5 Nov 2026
  2. 5 Nov 2026 · 02:36:20 UTC EPSS0.5%; scored 3 Nov 2026 → 0.5%; scored 4 Nov 2026
  3. 4 Nov 2026 · 03:04:37 UTC EPSS0.5%; scored 2 Nov 2026 → 0.5%; scored 3 Nov 2026
  4. 3 Nov 2026 · 01:53:36 UTC EPSS0.5%; scored 1 Nov 2026 → 0.5%; scored 2 Nov 2026
  5. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  6. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  7. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  8. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  9. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  10. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  11. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  12. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  13. 2 Nov 2026 · 00:36:51 UTC EPSS0.5%; scored 31 Oct 2026 → 0.5%; scored 1 Nov 2026
  14. 31 Oct 2026 · 18:22:15 UTC EPSS0.5%; scored 30 Oct 2026 → 0.5%; scored 31 Oct 2026
  15. 30 Oct 2026 · 18:02:45 UTC EPSS0.5%; scored 29 Oct 2026 → 0.5%; scored 30 Oct 2026
  16. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  17. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  18. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  19. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  20. 29 Oct 2026 · 18:33:30 UTC EPSS0.5%; scored 28 Oct 2026 → 0.5%; scored 29 Oct 2026
  21. 28 Oct 2026 · 20:00:33 UTC EPSS0.5%; scored 27 Oct 2026 → 0.5%; scored 28 Oct 2026
  22. 27 Oct 2026 · 15:48:13 UTC EPSS0.5%; scored 26 Oct 2026 → 0.5%; scored 27 Oct 2026
  23. 26 Oct 2026 · 23:57:09 UTC EPSS0.5%; scored 25 Oct 2026 → 0.5%; scored 26 Oct 2026
  24. 25 Oct 2026 · 17:12:51 UTC EPSS0.5%; scored 24 Oct 2026 → 0.5%; scored 25 Oct 2026
  25. 25 Oct 2026 · 01:34:18 UTC EPSS0.5%; scored 23 Oct 2026 → 0.5%; scored 24 Oct 2026
  26. 23 Oct 2026 · 15:51:28 UTC EPSS0.5%; scored 22 Oct 2026 → 0.5%; scored 23 Oct 2026
  27. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  28. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  29. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  30. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  31. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  32. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  33. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  34. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  35. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  36. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  37. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  38. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  39. 22 Oct 2026 · 17:33:15 UTC EPSS0.5%; scored 21 Oct 2026 → 0.5%; scored 22 Oct 2026
  40. 21 Oct 2026 · 21:47:24 UTC EPSS0.5%; scored 20 Oct 2026 → 0.5%; scored 21 Oct 2026
  41. 20 Oct 2026 · 20:53:31 UTC EPSS0.5%; scored 19 Oct 2026 → 0.5%; scored 20 Oct 2026
  42. 19 Oct 2026 · 15:12:40 UTC EPSS0.5%; scored 18 Oct 2026 → 0.5%; scored 19 Oct 2026
  43. 18 Oct 2026 · 14:54:30 UTC EPSS0.5%; scored 16 Oct 2026 → 0.5%; scored 18 Oct 2026
  44. 18 Oct 2026 · 14:54:30 UTC Link: September 2026/security?release=2026-Sep#cves
  45. 16 Oct 2026 · 16:13:25 UTC EPSS0.5%; scored 15 Oct 2026 → 0.5%; scored 16 Oct 2026
  46. 15 Oct 2026 · 21:30:54 UTC EPSS0.5%; scored 14 Oct 2026 → 0.5%; scored 15 Oct 2026
  47. 15 Oct 2026 · 01:07:54 UTC EPSS0.5%; scored 13 Oct 2026 → 0.5%; scored 14 Oct 2026
  48. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
ChangeIntel

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Sources read 11 Nov 03:41 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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