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Recorded 4 Nov 2026 at 03:04 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

Microsoft Excel Remote Code Execution Vulnerability

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

What it said

CVE
CVE-2026-81396
Severity
Important
CVSS base score
7.8
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
Exploitation detected
No known exploitation (MSRC assessment)
Publicly disclosed
No (MSRC assessment)
Exploitability
Exploitation Unlikely
Component
Microsoft Office Excel
Weakness
CWE-121: Stack-based Buffer Overflow
Issued by
Microsoft
Customer action
Required: follow the MSRC remediation guidance
Affected products
Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems, Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition), Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft Office 365 for Mac, Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024, Office Online Server
Updates that fix it
KB5002904: Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition); KB5002910: Office Online Server; KB5002914: Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
CISA KEV
Not listed in the collected catalog
EPSS
0.5%; scored 3 Nov 2026
Public detection template
No Nuclei template listed
Published
8 Sep 2026 07:00 UTC
Last revised
16 Oct 2026 07:00 UTC
Revision note
Updated an acknowledgement. This is an informational change only.
Public exploit code
No Nuclei template listed

Source evidence when recorded

Microsoft security releases
Complete at observationRead 4 Nov 2026 at 03:03 UTC
CISA KEV
Complete at observationRead 4 Nov 2026 at 03:03 UTC
FIRST EPSS
Complete at observationRead 4 Nov 2026 at 03:03 UTC
Public detection templates (Nuclei)
Complete at observationRead 4 Nov 2026 at 03:03 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
  6. Publisher revision note: Microsoft is announcing the availability of the security updates for Microsoft Office for Mac. Customers running affected Mac software should install the update for their product to be protected from this vulnerability. Customers running other Microsoft Office software do not need to take any actio… → Updated an acknowledgement. This is an informational change only. · Fixes: KB5002904: Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition); KB5002914: Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition) → KB5002904: Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition); KB5002910: Office Online Server; KB5002914: Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition) · Affected products: Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems, Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition), Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft Office 365 for Mac, Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024 → Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems, Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition), Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft Office 365 for Mac, Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024, Office Online Server
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 (51)

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

  1. 4 Nov 2026 · 03:04:37 UTC EPSS0.5%; scored 2 Nov 2026 → 0.5%; scored 3 Nov 2026
  2. 3 Nov 2026 · 01:53:36 UTC EPSS0.5%; scored 1 Nov 2026 → 0.5%; scored 2 Nov 2026
  3. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  5. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  6. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  7. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  8. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  9. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  10. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  11. 2 Nov 2026 · 00:36:51 UTC EPSS0.5%; scored 31 Oct 2026 → 0.5%; scored 1 Nov 2026
  12. 31 Oct 2026 · 18:22:15 UTC EPSS0.5%; scored 30 Oct 2026 → 0.5%; scored 31 Oct 2026
  13. 30 Oct 2026 · 18:02:45 UTC EPSS0.5%; scored 29 Oct 2026 → 0.5%; scored 30 Oct 2026
  14. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  15. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  16. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  17. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  18. 29 Oct 2026 · 18:33:30 UTC EPSS0.5%; scored 28 Oct 2026 → 0.5%; scored 29 Oct 2026
  19. 28 Oct 2026 · 20:00:33 UTC EPSS0.5%; scored 27 Oct 2026 → 0.5%; scored 28 Oct 2026
  20. 27 Oct 2026 · 15:48:13 UTC EPSS0.5%; scored 26 Oct 2026 → 0.5%; scored 27 Oct 2026
  21. 26 Oct 2026 · 23:57:09 UTC EPSS0.5%; scored 25 Oct 2026 → 0.5%; scored 26 Oct 2026
  22. 25 Oct 2026 · 17:12:51 UTC EPSS0.5%; scored 24 Oct 2026 → 0.5%; scored 25 Oct 2026
  23. 25 Oct 2026 · 01:34:18 UTC EPSS0.5%; scored 23 Oct 2026 → 0.5%; scored 24 Oct 2026
  24. 23 Oct 2026 · 15:51:28 UTC EPSS0.5%; scored 22 Oct 2026 → 0.5%; scored 23 Oct 2026
  25. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  26. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  27. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  28. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  29. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  30. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  31. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  32. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  33. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  34. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  35. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  36. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  37. 22 Oct 2026 · 17:33:15 UTC EPSS0.5%; scored 21 Oct 2026 → 0.5%; scored 22 Oct 2026
  38. 21 Oct 2026 · 21:47:24 UTC EPSS0.5%; scored 20 Oct 2026 → 0.5%; scored 21 Oct 2026
  39. 20 Oct 2026 · 20:53:31 UTC EPSS0.5%; scored 19 Oct 2026 → 0.5%; scored 20 Oct 2026
  40. 19 Oct 2026 · 15:12:40 UTC EPSS0.5%; scored 18 Oct 2026 → 0.5%; scored 19 Oct 2026
  41. 18 Oct 2026 · 14:54:30 UTC EPSS0.5%; scored 16 Oct 2026 → 0.5%; scored 18 Oct 2026
  42. 18 Oct 2026 · 14:54:30 UTC Link: September 2026/security?release=2026-Sep#cves
  43. 16 Oct 2026 · 16:13:25 UTC EPSS0.5%; scored 15 Oct 2026 → 0.5%; scored 16 Oct 2026
  44. 16 Oct 2026 · 15:49:54 UTC Revision noteMicrosoft is announcing the availability of the security updates for Microsoft Office for Mac. Customers running affected Mac software should install the update for their product to be protected from this vulnerability. Customers running other Microsoft Office software do not need to take any actio… → Updated an acknowledgement. This is an informational change only.
  45. 16 Oct 2026 · 15:49:54 UTC Last revised17 Sep 2026 07:00 UTC → 16 Oct 2026 07:00 UTC
  46. 16 Oct 2026 · 15:49:54 UTC Updates that fix itKB5002904: Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition); KB5002914: Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition) → KB5002904: Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition); KB5002910: Office Online Server; KB5002914: Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
  47. 16 Oct 2026 · 15:49:54 UTC Affected productsMicrosoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems, Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition), Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft Office 365 for Mac, Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024 → Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems, Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition), Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft Office 365 for Mac, Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024, Office Online Server
  48. 16 Oct 2026 · 15:49:54 UTC Link: KB5002910/windows/kb/KB5002910
  49. 15 Oct 2026 · 21:30:54 UTC EPSS0.5%; scored 14 Oct 2026 → 0.5%; scored 15 Oct 2026
  50. 15 Oct 2026 · 01:07:54 UTC EPSS0.5%; scored 13 Oct 2026 → 0.5%; scored 14 Oct 2026
  51. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 11 Nov 05:47 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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