CVE-2026-69943ImportantRCENetwork

Microsoft Office SharePoint Remote Code Execution Vulnerability

MSRC advisory NVD CVE.org

Assessment

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

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

CVSS 3.1 base metricsRed raises the risk · green lowers it

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

Updates that fix it

1 KB

KB	Type	Restart	Applies to	Other CVEs
KB5002927	Security Update	Required	Microsoft SharePoint Server Subscription Edition	All CVEs in KB5002927

What changed

First observed 14 Oct 2026

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

Show 14 more recent changes

23 Oct 2026 · 08:31:50 UTCSource coverage: first-epss Current → Incomplete
23 Oct 2026 · 08:31:50 UTCSource coverage: cisa-kev Current → Incomplete
23 Oct 2026 · 08:31:50 UTCSource coverage: msrc-cvrf Current → Incomplete
22 Oct 2026 · 17:33:15 UTCEPSS 1.0%; scored 21 Oct 2026 → 1.0%; scored 22 Oct 2026
21 Oct 2026 · 21:47:24 UTCEPSS 1.0%; scored 20 Oct 2026 → 1.0%; scored 21 Oct 2026
21 Oct 2026 · 06:34:48 UTCAffected products Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition → Microsoft SharePoint Server Subscription Edition
20 Oct 2026 · 20:53:31 UTCEPSS 1.0%; scored 19 Oct 2026 → 1.0%; scored 20 Oct 2026
19 Oct 2026 · 15:12:40 UTCEPSS 1.0%; scored 18 Oct 2026 → 1.0%; scored 19 Oct 2026
18 Oct 2026 · 14:54:30 UTCEPSS 1.0%; scored 16 Oct 2026 → 1.0%; scored 18 Oct 2026
18 Oct 2026 · 14:54:30 UTCLink: October 2026 → /security?release=2026-Oct#cves
16 Oct 2026 · 16:13:25 UTCEPSS 0.8%; scored 15 Oct 2026 → 1.0%; scored 16 Oct 2026
15 Oct 2026 · 21:30:54 UTCEPSS 0.8%; scored 14 Oct 2026 → 0.8%; scored 15 Oct 2026
15 Oct 2026 · 21:30:54 UTCUpdates that fix it KB5002927: Microsoft SharePoint Server Subscription Edition → KB5002927: Microsoft SharePoint Server Subscription Edition (restart required)
15 Oct 2026 · 01:07:54 UTCEPSS Not scored → 0.8%; scored 14 Oct 2026

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cve-program · CVE-2026-69943

Published

Microsoft SharePoint Server Subscription Edition

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Microsoft",
                    "product": "Microsoft SharePoint Server Subscription Edition",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "16.0.0",
                            "lessThan": "16.0.20326.20190",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }