Microsoft Office SharePoint Remote Code Execution Vulnerability

Severity

Important

CVSS base score

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Impact

Remote Code Execution

EPSS, next 30 days

1.2%Higher than 66.9% of scored CVEs · FIRST model run 25 Oct 2026 · about EPSS

Public exploit code

No Nuclei template lists it

Exploitability

Exploitation Less Likely

Publicly disclosed

No

Customer action

Required: apply the update

Component

Microsoft Office SharePoint

Weakness

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Issued by

Microsoft

Published

13 Oct 2026 · October 2026

Last revised

13 Oct 2026

Attack vector

NetworkAV:N

Attack complexity

LowAC:L

Privileges required

LowPR:L

User interaction

NoneUI:N

Scope

UnchangedS:U

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

1. 25 Oct 2026 · 17:12:51 UTC EPSS1.0%; scored 24 Oct 2026 → 1.2%; scored 25 Oct 2026
2. 25 Oct 2026 · 01:34:18 UTC EPSS1.0%; scored 23 Oct 2026 → 1.0%; scored 24 Oct 2026
3. 23 Oct 2026 · 15:51:28 UTC EPSS1.0%; scored 22 Oct 2026 → 1.0%; scored 23 Oct 2026
4. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
5. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
6. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
7. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
8. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
9. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
10. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
11. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
12. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete

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